Finding the Fourth Proportional to 1,003.69, 1,505.94 and 354.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.69 : 1,505.94 = 354.48 : x
2. Step 2: Convert to fraction form
   1,003.69/1,505.94 = 354.48/x
3. Step 3: Cross multiply
   1,003.69x = 1,505.94 × 354.48
4. Step 4: Simplify right side
   1,003.69x = 533,825.61
5. Step 5: Solve for x
   x = 533,825.61/1,003.69
6. Step 6: Final answer
   x = 531.86