Finding the Fourth Proportional to 385,456,978,609.83, 531,943,387,290.93 and 211,848,271,707.88

Step by Step Solution

1. Step 1: Write the proportion equation
   385,456,978,609.83 : 531,943,387,290.93 = 211,848,271,707.88 : x
2. Step 2: Convert to fraction form
   385,456,978,609.83/531,943,387,290.93 = 211,848,271,707.88/x
3. Step 3: Cross multiply
   385,456,978,609.83x = 531,943,387,290.93 × 211,848,271,707.88
4. Step 4: Simplify right side
   385,456,978,609.83x = 112,691,287,244,018,978,652,160
5. Step 5: Solve for x
   x = 112,691,287,244,018,978,652,160/385,456,978,609.83
6. Step 6: Final answer
   x = 292,357,626,136.24