Finding the Fourth Proportional to 6,427.21, 8,870.98 and 3,908.79

Step by Step Solution

1. Step 1: Write the proportion equation
   6,427.21 : 8,870.98 = 3,908.79 : x
2. Step 2: Convert to fraction form
   6,427.21/8,870.98 = 3,908.79/x
3. Step 3: Cross multiply
   6,427.21x = 8,870.98 × 3,908.79
4. Step 4: Simplify right side
   6,427.21x = 34,674,811.96
5. Step 5: Solve for x
   x = 34,674,811.96/6,427.21
6. Step 6: Final answer
   x = 5,395.00