Finding the Fourth Proportional to 1,382.48, 1,906.82 and 939.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.48 : 1,906.82 = 939.62 : x
2. Step 2: Convert to fraction form
   1,382.48/1,906.82 = 939.62/x
3. Step 3: Cross multiply
   1,382.48x = 1,906.82 × 939.62
4. Step 4: Simplify right side
   1,382.48x = 1,791,686.21
5. Step 5: Solve for x
   x = 1,791,686.21/1,382.48
6. Step 6: Final answer
   x = 1,295.99