Finding the Fourth Proportional to 3,870.40, 5,335.29 and 2,377.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.40 : 5,335.29 = 2,377.15 : x
2. Step 2: Convert to fraction form
   3,870.40/5,335.29 = 2,377.15/x
3. Step 3: Cross multiply
   3,870.40x = 5,335.29 × 2,377.15
4. Step 4: Simplify right side
   3,870.40x = 12,682,784.62
5. Step 5: Solve for x
   x = 12,682,784.62/3,870.40
6. Step 6: Final answer
   x = 3,276.87