Finding the Fourth Proportional to 13,752.72, 20,611.76 and 7,499.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,752.72 : 20,611.76 = 7,499.72 : x
2. Step 2: Convert to fraction form
   13,752.72/20,611.76 = 7,499.72/x
3. Step 3: Cross multiply
   13,752.72x = 20,611.76 × 7,499.72
4. Step 4: Simplify right side
   13,752.72x = 154,582,428.71
5. Step 5: Solve for x
   x = 154,582,428.71/13,752.72
6. Step 6: Final answer
   x = 11,240.13