Finding the Fourth Proportional to 2,085.90, 3,128.58 and 624.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.90 : 3,128.58 = 624.93 : x
2. Step 2: Convert to fraction form
   2,085.90/3,128.58 = 624.93/x
3. Step 3: Cross multiply
   2,085.90x = 3,128.58 × 624.93
4. Step 4: Simplify right side
   2,085.90x = 1,955,143.50
5. Step 5: Solve for x
   x = 1,955,143.50/2,085.90
6. Step 6: Final answer
   x = 937.31