Finding the Fourth Proportional to 2,870.19, 3,958.74 and 1,862.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.19 : 3,958.74 = 1,862.15 : x
2. Step 2: Convert to fraction form
   2,870.19/3,958.74 = 1,862.15/x
3. Step 3: Cross multiply
   2,870.19x = 3,958.74 × 1,862.15
4. Step 4: Simplify right side
   2,870.19x = 7,371,747.90
5. Step 5: Solve for x
   x = 7,371,747.90/2,870.19
6. Step 6: Final answer
   x = 2,568.38