Finding the Fourth Proportional to 3,870.57, 5,339.43 and 2,451.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.57 : 5,339.43 = 2,451.90 : x
2. Step 2: Convert to fraction form
   3,870.57/5,339.43 = 2,451.90/x
3. Step 3: Cross multiply
   3,870.57x = 5,339.43 × 2,451.90
4. Step 4: Simplify right side
   3,870.57x = 13,091,748.42
5. Step 5: Solve for x
   x = 13,091,748.42/3,870.57
6. Step 6: Final answer
   x = 3,382.38