Finding the Fourth Proportional to 21,748.56, 32,548.71 and 15,087.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,748.56 : 32,548.71 = 15,087.30 : x
2. Step 2: Convert to fraction form
   21,748.56/32,548.71 = 15,087.30/x
3. Step 3: Cross multiply
   21,748.56x = 32,548.71 × 15,087.30
4. Step 4: Simplify right side
   21,748.56x = 491,072,152.38
5. Step 5: Solve for x
   x = 491,072,152.38/21,748.56
6. Step 6: Final answer
   x = 22,579.52