Finding the Fourth Proportional to 112,939.31, 155,856.35 and 62,638.31

Step by Step Solution

1. Step 1: Write the proportion equation
   112,939.31 : 155,856.35 = 62,638.31 : x
2. Step 2: Convert to fraction form
   112,939.31/155,856.35 = 62,638.31/x
3. Step 3: Cross multiply
   112,939.31x = 155,856.35 × 62,638.31
4. Step 4: Simplify right side
   112,939.31x = 9,762,578,913.01
5. Step 5: Solve for x
   x = 9,762,578,913.01/112,939.31
6. Step 6: Final answer
   x = 86,440.93