Finding the Fourth Proportional to 216,406,978.84, 298,467,496.54 and 190,245,559.96

Step by Step Solution

1. Step 1: Write the proportion equation
   216,406,978.84 : 298,467,496.54 = 190,245,559.96 : x
2. Step 2: Convert to fraction form
   216,406,978.84/298,467,496.54 = 190,245,559.96/x
3. Step 3: Cross multiply
   216,406,978.84x = 298,467,496.54 × 190,245,559.96
4. Step 4: Simplify right side
   216,406,978.84x = 56,782,116,009,111,672
5. Step 5: Solve for x
   x = 56,782,116,009,111,672/216,406,978.84
6. Step 6: Final answer
   x = 262,385,789.56