Finding the Fourth Proportional to 2,238.16, 3,357.72 and 938.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,238.16 : 3,357.72 = 938.88 : x
2. Step 2: Convert to fraction form
   2,238.16/3,357.72 = 938.88/x
3. Step 3: Cross multiply
   2,238.16x = 3,357.72 × 938.88
4. Step 4: Simplify right side
   2,238.16x = 3,152,496.15
5. Step 5: Solve for x
   x = 3,152,496.15/2,238.16
6. Step 6: Final answer
   x = 1,408.52