Finding the Fourth Proportional to 2,087.40, 3,131.69 and 1,046.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.40 : 3,131.69 = 1,046.15 : x
2. Step 2: Convert to fraction form
   2,087.40/3,131.69 = 1,046.15/x
3. Step 3: Cross multiply
   2,087.40x = 3,131.69 × 1,046.15
4. Step 4: Simplify right side
   2,087.40x = 3,276,217.49
5. Step 5: Solve for x
   x = 3,276,217.49/2,087.40
6. Step 6: Final answer
   x = 1,569.52