Finding the Fourth Proportional to 259,552.70, 389,256.15 and 82,114.10

Step by Step Solution

1. Step 1: Write the proportion equation
   259,552.70 : 389,256.15 = 82,114.10 : x
2. Step 2: Convert to fraction form
   259,552.70/389,256.15 = 82,114.10/x
3. Step 3: Cross multiply
   259,552.70x = 389,256.15 × 82,114.10
4. Step 4: Simplify right side
   259,552.70x = 31,963,418,426.72
5. Step 5: Solve for x
   x = 31,963,418,426.72/259,552.70
6. Step 6: Final answer
   x = 123,148.09