Finding the Fourth Proportional to 6,216.78, 8,572.71 and 4,800.70

Step by Step Solution

1. Step 1: Write the proportion equation
   6,216.78 : 8,572.71 = 4,800.70 : x
2. Step 2: Convert to fraction form
   6,216.78/8,572.71 = 4,800.70/x
3. Step 3: Cross multiply
   6,216.78x = 8,572.71 × 4,800.70
4. Step 4: Simplify right side
   6,216.78x = 41,155,037.62
5. Step 5: Solve for x
   x = 41,155,037.62/6,216.78
6. Step 6: Final answer
   x = 6,619.99