Finding the Fourth Proportional to 1,003.34, 1,505.02 and 354.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.34 : 1,505.02 = 354.18 : x
2. Step 2: Convert to fraction form
   1,003.34/1,505.02 = 354.18/x
3. Step 3: Cross multiply
   1,003.34x = 1,505.02 × 354.18
4. Step 4: Simplify right side
   1,003.34x = 533,047.98
5. Step 5: Solve for x
   x = 533,047.98/1,003.34
6. Step 6: Final answer
   x = 531.27