Finding the Fourth Proportional to 89,791.50, 134,687.94 and 39,858.18

Step by Step Solution

1. Step 1: Write the proportion equation
   89,791.50 : 134,687.94 = 39,858.18 : x
2. Step 2: Convert to fraction form
   89,791.50/134,687.94 = 39,858.18/x
3. Step 3: Cross multiply
   89,791.50x = 134,687.94 × 39,858.18
4. Step 4: Simplify right side
   89,791.50x = 5,368,416,156.35
5. Step 5: Solve for x
   x = 5,368,416,156.35/89,791.50
6. Step 6: Final answer
   x = 59,787.58