Finding the Fourth Proportional to 2,188.50, 3,281.76 and 628.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.50 : 3,281.76 = 628.15 : x
2. Step 2: Convert to fraction form
   2,188.50/3,281.76 = 628.15/x
3. Step 3: Cross multiply
   2,188.50x = 3,281.76 × 628.15
4. Step 4: Simplify right side
   2,188.50x = 2,061,421.14
5. Step 5: Solve for x
   x = 2,061,421.14/2,188.50
6. Step 6: Final answer
   x = 941.93