Finding the Fourth Proportional to 2,087.34, 3,130.47 and 854.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.34 : 3,130.47 = 854.52 : x
2. Step 2: Convert to fraction form
   2,087.34/3,130.47 = 854.52/x
3. Step 3: Cross multiply
   2,087.34x = 3,130.47 × 854.52
4. Step 4: Simplify right side
   2,087.34x = 2,675,049.22
5. Step 5: Solve for x
   x = 2,675,049.22/2,087.34
6. Step 6: Final answer
   x = 1,281.56