Finding the Fourth Proportional to 91,802.74, 137,718.51 and 39,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,802.74 : 137,718.51 = 39,212.50 : x
2. Step 2: Convert to fraction form
   91,802.74/137,718.51 = 39,212.50/x
3. Step 3: Cross multiply
   91,802.74x = 137,718.51 × 39,212.50
4. Step 4: Simplify right side
   91,802.74x = 5,400,287,073.38
5. Step 5: Solve for x
   x = 5,400,287,073.38/91,802.74
6. Step 6: Final answer
   x = 58,824.90