Finding the Fourth Proportional to 113,512.61, 156,633.68 and 65,112.03

Step by Step Solution

1. Step 1: Write the proportion equation
   113,512.61 : 156,633.68 = 65,112.03 : x
2. Step 2: Convert to fraction form
   113,512.61/156,633.68 = 65,112.03/x
3. Step 3: Cross multiply
   113,512.61x = 156,633.68 × 65,112.03
4. Step 4: Simplify right side
   113,512.61x = 10,198,736,871.17
5. Step 5: Solve for x
   x = 10,198,736,871.17/113,512.61
6. Step 6: Final answer
   x = 89,846.73