Finding the Fourth Proportional to 111,518.72, 153,893.40 and 60,531.55

Step by Step Solution

1. Step 1: Write the proportion equation
   111,518.72 : 153,893.40 = 60,531.55 : x
2. Step 2: Convert to fraction form
   111,518.72/153,893.40 = 60,531.55/x
3. Step 3: Cross multiply
   111,518.72x = 153,893.40 × 60,531.55
4. Step 4: Simplify right side
   111,518.72x = 9,315,405,425.04
5. Step 5: Solve for x
   x = 9,315,405,425.04/111,518.72
6. Step 6: Final answer
   x = 83,532.21