Finding the Fourth Proportional to 6,420.28, 8,860.78 and 3,625.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,420.28 : 8,860.78 = 3,625.76 : x
2. Step 2: Convert to fraction form
   6,420.28/8,860.78 = 3,625.76/x
3. Step 3: Cross multiply
   6,420.28x = 8,860.78 × 3,625.76
4. Step 4: Simplify right side
   6,420.28x = 32,127,061.69
5. Step 5: Solve for x
   x = 32,127,061.69/6,420.28
6. Step 6: Final answer
   x = 5,004.00