Finding the Fourth Proportional to 15,462.72, 21,338.56 and 8,748.20

Step by Step Solution

1. Step 1: Write the proportion equation
   15,462.72 : 21,338.56 = 8,748.20 : x
2. Step 2: Convert to fraction form
   15,462.72/21,338.56 = 8,748.20/x
3. Step 3: Cross multiply
   15,462.72x = 21,338.56 × 8,748.20
4. Step 4: Simplify right side
   15,462.72x = 186,673,990.59
5. Step 5: Solve for x
   x = 186,673,990.59/15,462.72
6. Step 6: Final answer
   x = 12,072.52