Finding the Fourth Proportional to 111,280.24, 153,561.72 and 60,978.16

Step by Step Solution

1. Step 1: Write the proportion equation
   111,280.24 : 153,561.72 = 60,978.16 : x
2. Step 2: Convert to fraction form
   111,280.24/153,561.72 = 60,978.16/x
3. Step 3: Cross multiply
   111,280.24x = 153,561.72 × 60,978.16
4. Step 4: Simplify right side
   111,280.24x = 9,363,911,132.04
5. Step 5: Solve for x
   x = 9,363,911,132.04/111,280.24
6. Step 6: Final answer
   x = 84,147.11