Finding the Fourth Proportional to 1,002.67, 1,503.82 and 272.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.67 : 1,503.82 = 272.15 : x
2. Step 2: Convert to fraction form
   1,002.67/1,503.82 = 272.15/x
3. Step 3: Cross multiply
   1,002.67x = 1,503.82 × 272.15
4. Step 4: Simplify right side
   1,002.67x = 409,264.61
5. Step 5: Solve for x
   x = 409,264.61/1,002.67
6. Step 6: Final answer
   x = 408.17