Finding the Fourth Proportional to 1,356.82, 1,872.18 and 938.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.82 : 1,872.18 = 938.18 : x
2. Step 2: Convert to fraction form
   1,356.82/1,872.18 = 938.18/x
3. Step 3: Cross multiply
   1,356.82x = 1,872.18 × 938.18
4. Step 4: Simplify right side
   1,356.82x = 1,756,446.51
5. Step 5: Solve for x
   x = 1,756,446.51/1,356.82
6. Step 6: Final answer
   x = 1,294.53