Finding the Fourth Proportional to 13,491.76, 18,619.12 and 7,524.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,491.76 : 18,619.12 = 7,524.72 : x
2. Step 2: Convert to fraction form
   13,491.76/18,619.12 = 7,524.72/x
3. Step 3: Cross multiply
   13,491.76x = 18,619.12 × 7,524.72
4. Step 4: Simplify right side
   13,491.76x = 140,103,664.65
5. Step 5: Solve for x
   x = 140,103,664.65/13,491.76
6. Step 6: Final answer
   x = 10,384.39