Finding the Fourth Proportional to 1,165,261,123.40, 1,608,060,995.42 and 629,412,785.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165,261,123.40 : 1,608,060,995.42 = 629,412,785.87 : x
2. Step 2: Convert to fraction form
   1,165,261,123.40/1,608,060,995.42 = 629,412,785.87/x
3. Step 3: Cross multiply
   1,165,261,123.40x = 1,608,060,995.42 × 629,412,785.87
4. Step 4: Simplify right side
   1,165,261,123.40x = 1,012,134,150,965,000,192
5. Step 5: Solve for x
   x = 1,012,134,150,965,000,192/1,165,261,123.40
6. Step 6: Final answer
   x = 868,589,992.96