Finding the Fourth Proportional to 11,393.52, 17,061.72 and 7,220.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,393.52 : 17,061.72 = 7,220.88 : x
2. Step 2: Convert to fraction form
   11,393.52/17,061.72 = 7,220.88/x
3. Step 3: Cross multiply
   11,393.52x = 17,061.72 × 7,220.88
4. Step 4: Simplify right side
   11,393.52x = 123,200,632.71
5. Step 5: Solve for x
   x = 123,200,632.71/11,393.52
6. Step 6: Final answer
   x = 10,813.22