Finding the Fourth Proportional to 2,271.56, 3,407.56 and 628.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,271.56 : 3,407.56 = 628.12 : x
2. Step 2: Convert to fraction form
   2,271.56/3,407.56 = 628.12/x
3. Step 3: Cross multiply
   2,271.56x = 3,407.56 × 628.12
4. Step 4: Simplify right side
   2,271.56x = 2,140,356.59
5. Step 5: Solve for x
   x = 2,140,356.59/2,271.56
6. Step 6: Final answer
   x = 942.24