Finding the Fourth Proportional to 92,868.90, 128,111.13 and 58,820.10

Step by Step Solution

1. Step 1: Write the proportion equation
   92,868.90 : 128,111.13 = 58,820.10 : x
2. Step 2: Convert to fraction form
   92,868.90/128,111.13 = 58,820.10/x
3. Step 3: Cross multiply
   92,868.90x = 128,111.13 × 58,820.10
4. Step 4: Simplify right side
   92,868.90x = 7,535,509,477.71
5. Step 5: Solve for x
   x = 7,535,509,477.71/92,868.90
6. Step 6: Final answer
   x = 81,141.37