Finding the Fourth Proportional to 113,443.58, 156,561.18 and 65,697.78

Step by Step Solution

1. Step 1: Write the proportion equation
   113,443.58 : 156,561.18 = 65,697.78 : x
2. Step 2: Convert to fraction form
   113,443.58/156,561.18 = 65,697.78/x
3. Step 3: Cross multiply
   113,443.58x = 156,561.18 × 65,697.78
4. Step 4: Simplify right side
   113,443.58x = 10,285,721,960.18
5. Step 5: Solve for x
   x = 10,285,721,960.18/113,443.58
6. Step 6: Final answer
   x = 90,668.17