Finding the Fourth Proportional to 12,637.06, 18,932.89 and 7,440.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,637.06 : 18,932.89 = 7,440.10 : x
2. Step 2: Convert to fraction form
   12,637.06/18,932.89 = 7,440.10/x
3. Step 3: Cross multiply
   12,637.06x = 18,932.89 × 7,440.10
4. Step 4: Simplify right side
   12,637.06x = 140,862,594.89
5. Step 5: Solve for x
   x = 140,862,594.89/12,637.06
6. Step 6: Final answer
   x = 11,146.79