Finding the Fourth Proportional to 231,061.15, 318,832.84 and 129,074

Step by Step Solution

1. Step 1: Write the proportion equation
   231,061.15 : 318,832.84 = 129,074 : x
2. Step 2: Convert to fraction form
   231,061.15/318,832.84 = 129,074/x
3. Step 3: Cross multiply
   231,061.15x = 318,832.84 × 129,074
4. Step 4: Simplify right side
   231,061.15x = 41,153,029,344.79
5. Step 5: Solve for x
   x = 41,153,029,344.79/231,061.15
6. Step 6: Final answer
   x = 178,104.49