Finding the Fourth Proportional to 2,312.30, 3,474.72 and 1,217.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,312.30 : 3,474.72 = 1,217.18 : x
2. Step 2: Convert to fraction form
   2,312.30/3,474.72 = 1,217.18/x
3. Step 3: Cross multiply
   2,312.30x = 3,474.72 × 1,217.18
4. Step 4: Simplify right side
   2,312.30x = 4,229,359.69
5. Step 5: Solve for x
   x = 4,229,359.69/2,312.30
6. Step 6: Final answer
   x = 1,829.07