Finding the Fourth Proportional to 10,404.78, 15,592.20 and 4,480.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,404.78 : 15,592.20 = 4,480.04 : x
2. Step 2: Convert to fraction form
   10,404.78/15,592.20 = 4,480.04/x
3. Step 3: Cross multiply
   10,404.78x = 15,592.20 × 4,480.04
4. Step 4: Simplify right side
   10,404.78x = 69,853,679.69
5. Step 5: Solve for x
   x = 69,853,679.69/10,404.78
6. Step 6: Final answer
   x = 6,713.61