Finding the Fourth Proportional to 1,382.04, 1,905.69 and 939.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.04 : 1,905.69 = 939.15 : x
2. Step 2: Convert to fraction form
   1,382.04/1,905.69 = 939.15/x
3. Step 3: Cross multiply
   1,382.04x = 1,905.69 × 939.15
4. Step 4: Simplify right side
   1,382.04x = 1,789,728.76
5. Step 5: Solve for x
   x = 1,789,728.76/1,382.04
6. Step 6: Final answer
   x = 1,294.99