Finding the Fourth Proportional to 13,490.36, 18,616.62 and 7,522.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,490.36 : 18,616.62 = 7,522.10 : x
2. Step 2: Convert to fraction form
   13,490.36/18,616.62 = 7,522.10/x
3. Step 3: Cross multiply
   13,490.36x = 18,616.62 × 7,522.10
4. Step 4: Simplify right side
   13,490.36x = 140,036,077.30
5. Step 5: Solve for x
   x = 140,036,077.30/13,490.36
6. Step 6: Final answer
   x = 10,380.46