Finding the Fourth Proportional to 111,131.19, 153,359.85 and 60,142.80

Step by Step Solution

1. Step 1: Write the proportion equation
   111,131.19 : 153,359.85 = 60,142.80 : x
2. Step 2: Convert to fraction form
   111,131.19/153,359.85 = 60,142.80/x
3. Step 3: Cross multiply
   111,131.19x = 153,359.85 × 60,142.80
4. Step 4: Simplify right side
   111,131.19x = 9,223,490,786.58
5. Step 5: Solve for x
   x = 9,223,490,786.58/111,131.19
6. Step 6: Final answer
   x = 82,996.42