Finding the Fourth Proportional to 2,870.95, 3,960.24 and 1,808.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.95 : 3,960.24 = 1,808.30 : x
2. Step 2: Convert to fraction form
   2,870.95/3,960.24 = 1,808.30/x
3. Step 3: Cross multiply
   2,870.95x = 3,960.24 × 1,808.30
4. Step 4: Simplify right side
   2,870.95x = 7,161,301.99
5. Step 5: Solve for x
   x = 7,161,301.99/2,870.95
6. Step 6: Final answer
   x = 2,494.40