Finding the Fourth Proportional to 112,940.31, 155,857.73 and 62,639.31

Step by Step Solution

1. Step 1: Write the proportion equation
   112,940.31 : 155,857.73 = 62,639.31 : x
2. Step 2: Convert to fraction form
   112,940.31/155,857.73 = 62,639.31/x
3. Step 3: Cross multiply
   112,940.31x = 155,857.73 × 62,639.31
4. Step 4: Simplify right side
   112,940.31x = 9,762,820,665.37
5. Step 5: Solve for x
   x = 9,762,820,665.37/112,940.31
6. Step 6: Final answer
   x = 86,442.30