Finding the Fourth Proportional to 13,490.20, 18,615.86 and 7,522.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,490.20 : 18,615.86 = 7,522.52 : x
2. Step 2: Convert to fraction form
   13,490.20/18,615.86 = 7,522.52/x
3. Step 3: Cross multiply
   13,490.20x = 18,615.86 × 7,522.52
4. Step 4: Simplify right side
   13,490.20x = 140,038,179.17
5. Step 5: Solve for x
   x = 140,038,179.17/13,490.20
6. Step 6: Final answer
   x = 10,380.73