Finding the Fourth Proportional to 15,520.72, 21,406.82 and 10,748.64

Step by Step Solution

1. Step 1: Write the proportion equation
   15,520.72 : 21,406.82 = 10,748.64 : x
2. Step 2: Convert to fraction form
   15,520.72/21,406.82 = 10,748.64/x
3. Step 3: Cross multiply
   15,520.72x = 21,406.82 × 10,748.64
4. Step 4: Simplify right side
   15,520.72x = 230,094,201.72
5. Step 5: Solve for x
   x = 230,094,201.72/15,520.72
6. Step 6: Final answer
   x = 14,824.97