Finding the Fourth Proportional to 19,978.55, 29,960.04 and 7,491.76

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978.55 : 29,960.04 = 7,491.76 : x
2. Step 2: Convert to fraction form
   19,978.55/29,960.04 = 7,491.76/x
3. Step 3: Cross multiply
   19,978.55x = 29,960.04 × 7,491.76
4. Step 4: Simplify right side
   19,978.55x = 224,453,429.27
5. Step 5: Solve for x
   x = 224,453,429.27/19,978.55
6. Step 6: Final answer
   x = 11,234.72