Finding the Fourth Proportional to 1,626.81, 2,439.82 and 456.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,626.81 : 2,439.82 = 456.55 : x
2. Step 2: Convert to fraction form
   1,626.81/2,439.82 = 456.55/x
3. Step 3: Cross multiply
   1,626.81x = 2,439.82 × 456.55
4. Step 4: Simplify right side
   1,626.81x = 1,113,899.82
5. Step 5: Solve for x
   x = 1,113,899.82/1,626.81
6. Step 6: Final answer
   x = 684.71