Finding the Fourth Proportional to 111,128.72, 153,356.54 and 60,140.36

Step by Step Solution

1. Step 1: Write the proportion equation
   111,128.72 : 153,356.54 = 60,140.36 : x
2. Step 2: Convert to fraction form
   111,128.72/153,356.54 = 60,140.36/x
3. Step 3: Cross multiply
   111,128.72x = 153,356.54 × 60,140.36
4. Step 4: Simplify right side
   111,128.72x = 9,222,917,523.95
5. Step 5: Solve for x
   x = 9,222,917,523.95/111,128.72
6. Step 6: Final answer
   x = 82,993.10