Finding the Fourth Proportional to 260,937,123.57, 391,405,796.22 and 76,704,612.63

Step by Step Solution

1. Step 1: Write the proportion equation
   260,937,123.57 : 391,405,796.22 = 76,704,612.63 : x
2. Step 2: Convert to fraction form
   260,937,123.57/391,405,796.22 = 76,704,612.63/x
3. Step 3: Cross multiply
   260,937,123.57x = 391,405,796.22 × 76,704,612.63
4. Step 4: Simplify right side
   260,937,123.57x = 30,022,629,979,010,920
5. Step 5: Solve for x
   x = 30,022,629,979,010,920/260,937,123.57
6. Step 6: Final answer
   x = 115,056,951.53