Finding the Fourth Proportional to 1,003.38, 1,504.52 and 309.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.38 : 1,504.52 = 309.86 : x
2. Step 2: Convert to fraction form
   1,003.38/1,504.52 = 309.86/x
3. Step 3: Cross multiply
   1,003.38x = 1,504.52 × 309.86
4. Step 4: Simplify right side
   1,003.38x = 466,194.27
5. Step 5: Solve for x
   x = 466,194.27/1,003.38
6. Step 6: Final answer
   x = 464.62