Finding the Fourth Proportional to 1,002.52, 1,503.06 and 454.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.52 : 1,503.06 = 454.42 : x
2. Step 2: Convert to fraction form
   1,002.52/1,503.06 = 454.42/x
3. Step 3: Cross multiply
   1,002.52x = 1,503.06 × 454.42
4. Step 4: Simplify right side
   1,002.52x = 683,020.53
5. Step 5: Solve for x
   x = 683,020.53/1,002.52
6. Step 6: Final answer
   x = 681.30