Finding the Fourth Proportional to 6,405.03, 8,839.52 and 3,887.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,405.03 : 8,839.52 = 3,887.78 : x
2. Step 2: Convert to fraction form
   6,405.03/8,839.52 = 3,887.78/x
3. Step 3: Cross multiply
   6,405.03x = 8,839.52 × 3,887.78
4. Step 4: Simplify right side
   6,405.03x = 34,366,140.88
5. Step 5: Solve for x
   x = 34,366,140.88/6,405.03
6. Step 6: Final answer
   x = 5,365.49