Finding the Fourth Proportional to 2,085.43, 3,127.69 and 624.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.43 : 3,127.69 = 624.70 : x
2. Step 2: Convert to fraction form
   2,085.43/3,127.69 = 624.70/x
3. Step 3: Cross multiply
   2,085.43x = 3,127.69 × 624.70
4. Step 4: Simplify right side
   2,085.43x = 1,953,867.94
5. Step 5: Solve for x
   x = 1,953,867.94/2,085.43
6. Step 6: Final answer
   x = 936.91