Finding the Fourth Proportional to 21,499.28, 32,261.36 and 9,018.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,499.28 : 32,261.36 = 9,018.18 : x
2. Step 2: Convert to fraction form
   21,499.28/32,261.36 = 9,018.18/x
3. Step 3: Cross multiply
   21,499.28x = 32,261.36 × 9,018.18
4. Step 4: Simplify right side
   21,499.28x = 290,938,706.43
5. Step 5: Solve for x
   x = 290,938,706.43/21,499.28
6. Step 6: Final answer
   x = 13,532.49