Finding the Fourth Proportional to 89,789.50, 134,684.93 and 39,856.17

Step by Step Solution

1. Step 1: Write the proportion equation
   89,789.50 : 134,684.93 = 39,856.17 : x
2. Step 2: Convert to fraction form
   89,789.50/134,684.93 = 39,856.17/x
3. Step 3: Cross multiply
   89,789.50x = 134,684.93 × 39,856.17
4. Step 4: Simplify right side
   89,789.50x = 5,368,025,466.52
5. Step 5: Solve for x
   x = 5,368,025,466.52/89,789.50
6. Step 6: Final answer
   x = 59,784.56