Finding the Fourth Proportional to 113,143.35, 156,120.49 and 65,387.49

Step by Step Solution

1. Step 1: Write the proportion equation
   113,143.35 : 156,120.49 = 65,387.49 : x
2. Step 2: Convert to fraction form
   113,143.35/156,120.49 = 65,387.49/x
3. Step 3: Cross multiply
   113,143.35x = 156,120.49 × 65,387.49
4. Step 4: Simplify right side
   113,143.35x = 10,208,326,978.67
5. Step 5: Solve for x
   x = 10,208,326,978.67/113,143.35
6. Step 6: Final answer
   x = 90,224.72