Finding the Fourth Proportional to 111,242.43, 153,391.59 and 85,692.06

Step by Step Solution

1. Step 1: Write the proportion equation
   111,242.43 : 153,391.59 = 85,692.06 : x
2. Step 2: Convert to fraction form
   111,242.43/153,391.59 = 85,692.06/x
3. Step 3: Cross multiply
   111,242.43x = 153,391.59 × 85,692.06
4. Step 4: Simplify right side
   111,242.43x = 13,144,441,333.78
5. Step 5: Solve for x
   x = 13,144,441,333.78/111,242.43
6. Step 6: Final answer
   x = 118,160.32