Finding the Fourth Proportional to 113,507.61, 156,626.78 and 65,107.05

Step by Step Solution

1. Step 1: Write the proportion equation
   113,507.61 : 156,626.78 = 65,107.05 : x
2. Step 2: Convert to fraction form
   113,507.61/156,626.78 = 65,107.05/x
3. Step 3: Cross multiply
   113,507.61x = 156,626.78 × 65,107.05
4. Step 4: Simplify right side
   113,507.61x = 10,197,507,596.80
5. Step 5: Solve for x
   x = 10,197,507,596.80/113,507.61
6. Step 6: Final answer
   x = 89,839.86