Finding the Fourth Proportional to 2,399.78, 3,314.03 and 1,870.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.78 : 3,314.03 = 1,870.13 : x
2. Step 2: Convert to fraction form
   2,399.78/3,314.03 = 1,870.13/x
3. Step 3: Cross multiply
   2,399.78x = 3,314.03 × 1,870.13
4. Step 4: Simplify right side
   2,399.78x = 6,197,641.00
5. Step 5: Solve for x
   x = 6,197,641.00/2,399.78
6. Step 6: Final answer
   x = 2,582.59