Finding the Fourth Proportional to 10,561.20, 15,830.82 and 3,535.92

Step by Step Solution

1. Step 1: Write the proportion equation
   10,561.20 : 15,830.82 = 3,535.92 : x
2. Step 2: Convert to fraction form
   10,561.20/15,830.82 = 3,535.92/x
3. Step 3: Cross multiply
   10,561.20x = 15,830.82 × 3,535.92
4. Step 4: Simplify right side
   10,561.20x = 55,976,513.05
5. Step 5: Solve for x
   x = 55,976,513.05/10,561.20
6. Step 6: Final answer
   x = 5,300.20