Finding the Fourth Proportional to 1,074.38, 1,612.71 and 458.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.38 : 1,612.71 = 458.37 : x
2. Step 2: Convert to fraction form
   1,074.38/1,612.71 = 458.37/x
3. Step 3: Cross multiply
   1,074.38x = 1,612.71 × 458.37
4. Step 4: Simplify right side
   1,074.38x = 739,217.88
5. Step 5: Solve for x
   x = 739,217.88/1,074.38
6. Step 6: Final answer
   x = 688.04