Finding the Fourth Proportional to 2,086.34, 3,128.73 and 624.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.34 : 3,128.73 = 624.99 : x
2. Step 2: Convert to fraction form
   2,086.34/3,128.73 = 624.99/x
3. Step 3: Cross multiply
   2,086.34x = 3,128.73 × 624.99
4. Step 4: Simplify right side
   2,086.34x = 1,955,424.96
5. Step 5: Solve for x
   x = 1,955,424.96/2,086.34
6. Step 6: Final answer
   x = 937.25