Finding the Fourth Proportional to 111,436.20, 153,744.56 and 63,655.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111,436.20 : 153,744.56 = 63,655.72 : x
2. Step 2: Convert to fraction form
   111,436.20/153,744.56 = 63,655.72/x
3. Step 3: Cross multiply
   111,436.20x = 153,744.56 × 63,655.72
4. Step 4: Simplify right side
   111,436.20x = 9,786,719,960.24
5. Step 5: Solve for x
   x = 9,786,719,960.24/111,436.20
6. Step 6: Final answer
   x = 87,823.53