Finding the Fourth Proportional to 1,018.53, 1,528.27 and 1,002.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.53 : 1,528.27 = 1,002.15 : x
2. Step 2: Convert to fraction form
   1,018.53/1,528.27 = 1,002.15/x
3. Step 3: Cross multiply
   1,018.53x = 1,528.27 × 1,002.15
4. Step 4: Simplify right side
   1,018.53x = 1,531,553.28
5. Step 5: Solve for x
   x = 1,531,553.28/1,018.53
6. Step 6: Final answer
   x = 1,503.69