Finding the Fourth Proportional to 15,522.61, 21,420.57 and 8,808.10

Step by Step Solution

1. Step 1: Write the proportion equation
   15,522.61 : 21,420.57 = 8,808.10 : x
2. Step 2: Convert to fraction form
   15,522.61/21,420.57 = 8,808.10/x
3. Step 3: Cross multiply
   15,522.61x = 21,420.57 × 8,808.10
4. Step 4: Simplify right side
   15,522.61x = 188,674,371.47
5. Step 5: Solve for x
   x = 188,674,371.47/15,522.61
6. Step 6: Final answer
   x = 12,154.81