Finding the Fourth Proportional to 2,085.86, 3,128.76 and 624.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.86 : 3,128.76 = 624.95 : x
2. Step 2: Convert to fraction form
   2,085.86/3,128.76 = 624.95/x
3. Step 3: Cross multiply
   2,085.86x = 3,128.76 × 624.95
4. Step 4: Simplify right side
   2,085.86x = 1,955,318.56
5. Step 5: Solve for x
   x = 1,955,318.56/2,085.86
6. Step 6: Final answer
   x = 937.42