Finding the Fourth Proportional to 111,128.79, 153,356.52 and 60,140.40

Step by Step Solution

1. Step 1: Write the proportion equation
   111,128.79 : 153,356.52 = 60,140.40 : x
2. Step 2: Convert to fraction form
   111,128.79/153,356.52 = 60,140.40/x
3. Step 3: Cross multiply
   111,128.79x = 153,356.52 × 60,140.40
4. Step 4: Simplify right side
   111,128.79x = 9,222,922,455.41
5. Step 5: Solve for x
   x = 9,222,922,455.41/111,128.79
6. Step 6: Final answer
   x = 82,993.10