Finding the Fourth Proportional to 140,080.48, 193,276.56 and 85,618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   140,080.48 : 193,276.56 = 85,618.72 : x
2. Step 2: Convert to fraction form
   140,080.48/193,276.56 = 85,618.72/x
3. Step 3: Cross multiply
   140,080.48x = 193,276.56 × 85,618.72
4. Step 4: Simplify right side
   140,080.48x = 16,548,091,673.20
5. Step 5: Solve for x
   x = 16,548,091,673.20/140,080.48
6. Step 6: Final answer
   x = 118,132.75