Finding the Fourth Proportional to 10,358.30, 15,535.83 and 5,680.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,358.30 : 15,535.83 = 5,680.61 : x
2. Step 2: Convert to fraction form
   10,358.30/15,535.83 = 5,680.61/x
3. Step 3: Cross multiply
   10,358.30x = 15,535.83 × 5,680.61
4. Step 4: Simplify right side
   10,358.30x = 88,252,913.58
5. Step 5: Solve for x
   x = 88,252,913.58/10,358.30
6. Step 6: Final answer
   x = 8,520.02