Finding the Fourth Proportional to 279,286,499.02, 385,401,123.82 and 153,835,994.31

Step by Step Solution

1. Step 1: Write the proportion equation
   279,286,499.02 : 385,401,123.82 = 153,835,994.31 : x
2. Step 2: Convert to fraction form
   279,286,499.02/385,401,123.82 = 153,835,994.31/x
3. Step 3: Cross multiply
   279,286,499.02x = 385,401,123.82 × 153,835,994.31
4. Step 4: Simplify right side
   279,286,499.02x = 59,288,565,091,425,712
5. Step 5: Solve for x
   x = 59,288,565,091,425,712/279,286,499.02
6. Step 6: Final answer
   x = 212,285,825.84