Finding the Fourth Proportional to 6,362.72, 8,780.57 and 3,530.05

Step by Step Solution

1. Step 1: Write the proportion equation
   6,362.72 : 8,780.57 = 3,530.05 : x
2. Step 2: Convert to fraction form
   6,362.72/8,780.57 = 3,530.05/x
3. Step 3: Cross multiply
   6,362.72x = 8,780.57 × 3,530.05
4. Step 4: Simplify right side
   6,362.72x = 30,995,824.76
5. Step 5: Solve for x
   x = 30,995,824.76/6,362.72
6. Step 6: Final answer
   x = 4,871.47