Finding the Fourth Proportional to 6,427.27, 8,870.21 and 3,908.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,427.27 : 8,870.21 = 3,908.78 : x
2. Step 2: Convert to fraction form
   6,427.27/8,870.21 = 3,908.78/x
3. Step 3: Cross multiply
   6,427.27x = 8,870.21 × 3,908.78
4. Step 4: Simplify right side
   6,427.27x = 34,671,699.44
5. Step 5: Solve for x
   x = 34,671,699.44/6,427.27
6. Step 6: Final answer
   x = 5,394.47