Finding the Fourth Proportional to 111,380, 153,702.72 and 60,391.28

Step by Step Solution

1. Step 1: Write the proportion equation
   111,380 : 153,702.72 = 60,391.28 : x
2. Step 2: Convert to fraction form
   111,380/153,702.72 = 60,391.28/x
3. Step 3: Cross multiply
   111,380x = 153,702.72 × 60,391.28
4. Step 4: Simplify right side
   111,380x = 9,282,304,000.28
5. Step 5: Solve for x
   x = 9,282,304,000.28/111,380
6. Step 6: Final answer
   x = 83,339.06