Finding the Fourth Proportional to 2,399.40, 3,312.30 and 1,770.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.40 : 3,312.30 = 1,770.06 : x
2. Step 2: Convert to fraction form
   2,399.40/3,312.30 = 1,770.06/x
3. Step 3: Cross multiply
   2,399.40x = 3,312.30 × 1,770.06
4. Step 4: Simplify right side
   2,399.40x = 5,862,969.74
5. Step 5: Solve for x
   x = 5,862,969.74/2,399.40
6. Step 6: Final answer
   x = 2,443.51