Finding the Fourth Proportional to 112,386.26, 155,092.92 and 64,638.38

Step by Step Solution

1. Step 1: Write the proportion equation
   112,386.26 : 155,092.92 = 64,638.38 : x
2. Step 2: Convert to fraction form
   112,386.26/155,092.92 = 64,638.38/x
3. Step 3: Cross multiply
   112,386.26x = 155,092.92 × 64,638.38
4. Step 4: Simplify right side
   112,386.26x = 10,024,955,098.27
5. Step 5: Solve for x
   x = 10,024,955,098.27/112,386.26
6. Step 6: Final answer
   x = 89,200.90