Finding the Fourth Proportional to 21,915.24, 32,820.15 and 12,526.79

Step by Step Solution

1. Step 1: Write the proportion equation
   21,915.24 : 32,820.15 = 12,526.79 : x
2. Step 2: Convert to fraction form
   21,915.24/32,820.15 = 12,526.79/x
3. Step 3: Cross multiply
   21,915.24x = 32,820.15 × 12,526.79
4. Step 4: Simplify right side
   21,915.24x = 411,130,962.72
5. Step 5: Solve for x
   x = 411,130,962.72/21,915.24
6. Step 6: Final answer
   x = 18,760.05