Finding the Fourth Proportional to 1,002.18, 1,502.78 and 352.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.18 : 1,502.78 = 352.82 : x
2. Step 2: Convert to fraction form
   1,002.18/1,502.78 = 352.82/x
3. Step 3: Cross multiply
   1,002.18x = 1,502.78 × 352.82
4. Step 4: Simplify right side
   1,002.18x = 530,210.84
5. Step 5: Solve for x
   x = 530,210.84/1,002.18
6. Step 6: Final answer
   x = 529.06