Finding the Fourth Proportional to 89,685.97, 134,436.65 and 39,789.56

Step by Step Solution

1. Step 1: Write the proportion equation
   89,685.97 : 134,436.65 = 39,789.56 : x
2. Step 2: Convert to fraction form
   89,685.97/134,436.65 = 39,789.56/x
3. Step 3: Cross multiply
   89,685.97x = 134,436.65 × 39,789.56
4. Step 4: Simplify right side
   89,685.97x = 5,349,175,288.52
5. Step 5: Solve for x
   x = 5,349,175,288.52/89,685.97
6. Step 6: Final answer
   x = 59,643.39