Finding the Fourth Proportional to 89,617.50, 134,426.52 and 26,438.40

Step by Step Solution

1. Step 1: Write the proportion equation
   89,617.50 : 134,426.52 = 26,438.40 : x
2. Step 2: Convert to fraction form
   89,617.50/134,426.52 = 26,438.40/x
3. Step 3: Cross multiply
   89,617.50x = 134,426.52 × 26,438.40
4. Step 4: Simplify right side
   89,617.50x = 3,554,022,106.37
5. Step 5: Solve for x
   x = 3,554,022,106.37/89,617.50
6. Step 6: Final answer
   x = 39,657.68