Finding the Fourth Proportional to 113,333.72, 156,390.89 and 65,590.02

Step by Step Solution

1. Step 1: Write the proportion equation
   113,333.72 : 156,390.89 = 65,590.02 : x
2. Step 2: Convert to fraction form
   113,333.72/156,390.89 = 65,590.02/x
3. Step 3: Cross multiply
   113,333.72x = 156,390.89 × 65,590.02
4. Step 4: Simplify right side
   113,333.72x = 10,257,681,274.97
5. Step 5: Solve for x
   x = 10,257,681,274.97/113,333.72
6. Step 6: Final answer
   x = 90,508.65