Finding the Fourth Proportional to 1,002.62, 1,503.77 and 272.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.62 : 1,503.77 = 272.03 : x
2. Step 2: Convert to fraction form
   1,002.62/1,503.77 = 272.03/x
3. Step 3: Cross multiply
   1,002.62x = 1,503.77 × 272.03
4. Step 4: Simplify right side
   1,002.62x = 409,061.67
5. Step 5: Solve for x
   x = 409,061.67/1,002.62
6. Step 6: Final answer
   x = 407.99