Finding the Fourth Proportional to 2,086.05, 3,128.17 and 624.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.05 : 3,128.17 = 624.86 : x
2. Step 2: Convert to fraction form
   2,086.05/3,128.17 = 624.86/x
3. Step 3: Cross multiply
   2,086.05x = 3,128.17 × 624.86
4. Step 4: Simplify right side
   2,086.05x = 1,954,668.31
5. Step 5: Solve for x
   x = 1,954,668.31/2,086.05
6. Step 6: Final answer
   x = 937.02