Finding the Fourth Proportional to 113,643.05, 156,813.72 and 65,242.31

Step by Step Solution

1. Step 1: Write the proportion equation
   113,643.05 : 156,813.72 = 65,242.31 : x
2. Step 2: Convert to fraction form
   113,643.05/156,813.72 = 65,242.31/x
3. Step 3: Cross multiply
   113,643.05x = 156,813.72 × 65,242.31
4. Step 4: Simplify right side
   113,643.05x = 10,230,889,332.49
5. Step 5: Solve for x
   x = 10,230,889,332.49/113,643.05
6. Step 6: Final answer
   x = 90,026.53