Finding the Fourth Proportional to 2,087.71, 3,130.17 and 1,252.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.71 : 3,130.17 = 1,252.89 : x
2. Step 2: Convert to fraction form
   2,087.71/3,130.17 = 1,252.89/x
3. Step 3: Cross multiply
   2,087.71x = 3,130.17 × 1,252.89
4. Step 4: Simplify right side
   2,087.71x = 3,921,758.69
5. Step 5: Solve for x
   x = 3,921,758.69/2,087.71
6. Step 6: Final answer
   x = 1,878.50