Finding the Fourth Proportional to 2,086.52, 3,128.74 and 625.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.52 : 3,128.74 = 625.28 : x
2. Step 2: Convert to fraction form
   2,086.52/3,128.74 = 625.28/x
3. Step 3: Cross multiply
   2,086.52x = 3,128.74 × 625.28
4. Step 4: Simplify right side
   2,086.52x = 1,956,338.55
5. Step 5: Solve for x
   x = 1,956,338.55/2,086.52
6. Step 6: Final answer
   x = 937.61