Finding the Fourth Proportional to 2,085.96, 3,128.17 and 624.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.96 : 3,128.17 = 624.62 : x
2. Step 2: Convert to fraction form
   2,085.96/3,128.17 = 624.62/x
3. Step 3: Cross multiply
   2,085.96x = 3,128.17 × 624.62
4. Step 4: Simplify right side
   2,085.96x = 1,953,917.55
5. Step 5: Solve for x
   x = 1,953,917.55/2,085.96
6. Step 6: Final answer
   x = 936.70