Finding the Fourth Proportional to 21,388.44, 32,061.12 and 8,915.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,388.44 : 32,061.12 = 8,915.37 : x
2. Step 2: Convert to fraction form
   21,388.44/32,061.12 = 8,915.37/x
3. Step 3: Cross multiply
   21,388.44x = 32,061.12 × 8,915.37
4. Step 4: Simplify right side
   21,388.44x = 285,836,593.75
5. Step 5: Solve for x
   x = 285,836,593.75/21,388.44
6. Step 6: Final answer
   x = 13,364.07