Finding the Fourth Proportional to 938.31, 1,408.68 and 722.04

Step by Step Solution

1. Step 1: Write the proportion equation
   938.31 : 1,408.68 = 722.04 : x
2. Step 2: Convert to fraction form
   938.31/1,408.68 = 722.04/x
3. Step 3: Cross multiply
   938.31x = 1,408.68 × 722.04
4. Step 4: Simplify right side
   938.31x = 1,017,123.31
5. Step 5: Solve for x
   x = 1,017,123.31/938.31
6. Step 6: Final answer
   x = 1,083.99