Finding the Fourth Proportional to 12,410.73, 18,612.15 and 4,089.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,410.73 : 18,612.15 = 4,089.20 : x
2. Step 2: Convert to fraction form
   12,410.73/18,612.15 = 4,089.20/x
3. Step 3: Cross multiply
   12,410.73x = 18,612.15 × 4,089.20
4. Step 4: Simplify right side
   12,410.73x = 76,108,695.38
5. Step 5: Solve for x
   x = 76,108,695.38/12,410.73
6. Step 6: Final answer
   x = 6,132.49