Finding the Fourth Proportional to 2,870.87, 3,960.23 and 1,877.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.87 : 3,960.23 = 1,877.13 : x
2. Step 2: Convert to fraction form
   2,870.87/3,960.23 = 1,877.13/x
3. Step 3: Cross multiply
   2,870.87x = 3,960.23 × 1,877.13
4. Step 4: Simplify right side
   2,870.87x = 7,433,857.15
5. Step 5: Solve for x
   x = 7,433,857.15/2,870.87
6. Step 6: Final answer
   x = 2,589.41