Finding the Fourth Proportional to 10,499.20, 15,751.02 and 3,478.82

Step by Step Solution

1. Step 1: Write the proportion equation
   10,499.20 : 15,751.02 = 3,478.82 : x
2. Step 2: Convert to fraction form
   10,499.20/15,751.02 = 3,478.82/x
3. Step 3: Cross multiply
   10,499.20x = 15,751.02 × 3,478.82
4. Step 4: Simplify right side
   10,499.20x = 54,794,884.64
5. Step 5: Solve for x
   x = 54,794,884.64/10,499.20
6. Step 6: Final answer
   x = 5,218.96