Finding the Fourth Proportional to 13,491.07, 18,616.31 and 7,522.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,491.07 : 18,616.31 = 7,522.18 : x
2. Step 2: Convert to fraction form
   13,491.07/18,616.31 = 7,522.18/x
3. Step 3: Cross multiply
   13,491.07x = 18,616.31 × 7,522.18
4. Step 4: Simplify right side
   13,491.07x = 140,035,234.76
5. Step 5: Solve for x
   x = 140,035,234.76/13,491.07
6. Step 6: Final answer
   x = 10,379.85