Finding the Fourth Proportional to 1,411.32, 1,948.38 and 939.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.32 : 1,948.38 = 939.88 : x
2. Step 2: Convert to fraction form
   1,411.32/1,948.38 = 939.88/x
3. Step 3: Cross multiply
   1,411.32x = 1,948.38 × 939.88
4. Step 4: Simplify right side
   1,411.32x = 1,831,243.39
5. Step 5: Solve for x
   x = 1,831,243.39/1,411.32
6. Step 6: Final answer
   x = 1,297.54