Finding the Fourth Proportional to 1,607.55, 2,411.31 and 453.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.55 : 2,411.31 = 453.30 : x
2. Step 2: Convert to fraction form
   1,607.55/2,411.31 = 453.30/x
3. Step 3: Cross multiply
   1,607.55x = 2,411.31 × 453.30
4. Step 4: Simplify right side
   1,607.55x = 1,093,046.82
5. Step 5: Solve for x
   x = 1,093,046.82/1,607.55
6. Step 6: Final answer
   x = 679.95