Finding the Fourth Proportional to 13,089.30, 18,062.25 and 7,422.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,089.30 : 18,062.25 = 7,422.74 : x
2. Step 2: Convert to fraction form
   13,089.30/18,062.25 = 7,422.74/x
3. Step 3: Cross multiply
   13,089.30x = 18,062.25 × 7,422.74
4. Step 4: Simplify right side
   13,089.30x = 134,071,335.15
5. Step 5: Solve for x
   x = 134,071,335.15/13,089.30
6. Step 6: Final answer
   x = 10,242.82