Finding the Fourth Proportional to 2,085.50, 3,127.91 and 624.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.50 : 3,127.91 = 624.30 : x
2. Step 2: Convert to fraction form
   2,085.50/3,127.91 = 624.30/x
3. Step 3: Cross multiply
   2,085.50x = 3,127.91 × 624.30
4. Step 4: Simplify right side
   2,085.50x = 1,952,751.09
5. Step 5: Solve for x
   x = 1,952,751.09/2,085.50
6. Step 6: Final answer
   x = 936.35