Finding the Fourth Proportional to 1,068.57, 1,603.49 and 452.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.57 : 1,603.49 = 452.39 : x
2. Step 2: Convert to fraction form
   1,068.57/1,603.49 = 452.39/x
3. Step 3: Cross multiply
   1,068.57x = 1,603.49 × 452.39
4. Step 4: Simplify right side
   1,068.57x = 725,392.56
5. Step 5: Solve for x
   x = 725,392.56/1,068.57
6. Step 6: Final answer
   x = 678.84