Finding the Fourth Proportional to 113,143.45, 156,120.61 and 65,387.58

Step by Step Solution

1. Step 1: Write the proportion equation
   113,143.45 : 156,120.61 = 65,387.58 : x
2. Step 2: Convert to fraction form
   113,143.45/156,120.61 = 65,387.58/x
3. Step 3: Cross multiply
   113,143.45x = 156,120.61 × 65,387.58
4. Step 4: Simplify right side
   113,143.45x = 10,208,348,876.02
5. Step 5: Solve for x
   x = 10,208,348,876.02/113,143.45
6. Step 6: Final answer
   x = 90,224.83