Finding the Fourth Proportional to 123,354.25, 170,260.77 and 80,440.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,354.25 : 170,260.77 = 80,440.72 : x
2. Step 2: Convert to fraction form
   123,354.25/170,260.77 = 80,440.72/x
3. Step 3: Cross multiply
   123,354.25x = 170,260.77 × 80,440.72
4. Step 4: Simplify right side
   123,354.25x = 13,695,898,926.55
5. Step 5: Solve for x
   x = 13,695,898,926.55/123,354.25
6. Step 6: Final answer
   x = 111,029.00