Finding the Fourth Proportional to 2,287.08, 3,156.18 and 1,239.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.08 : 3,156.18 = 1,239.14 : x
2. Step 2: Convert to fraction form
   2,287.08/3,156.18 = 1,239.14/x
3. Step 3: Cross multiply
   2,287.08x = 3,156.18 × 1,239.14
4. Step 4: Simplify right side
   2,287.08x = 3,910,948.89
5. Step 5: Solve for x
   x = 3,910,948.89/2,287.08
6. Step 6: Final answer
   x = 1,710.02