Finding the Fourth Proportional to 10,550.61, 15,820.65 and 3,528.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,550.61 : 15,820.65 = 3,528.18 : x
2. Step 2: Convert to fraction form
   10,550.61/15,820.65 = 3,528.18/x
3. Step 3: Cross multiply
   10,550.61x = 15,820.65 × 3,528.18
4. Step 4: Simplify right side
   10,550.61x = 55,818,100.92
5. Step 5: Solve for x
   x = 55,818,100.92/10,550.61
6. Step 6: Final answer
   x = 5,290.51