Finding the Fourth Proportional to 2,238.42, 3,355.58 and 939.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,238.42 : 3,355.58 = 939.98 : x
2. Step 2: Convert to fraction form
   2,238.42/3,355.58 = 939.98/x
3. Step 3: Cross multiply
   2,238.42x = 3,355.58 × 939.98
4. Step 4: Simplify right side
   2,238.42x = 3,154,178.09
5. Step 5: Solve for x
   x = 3,154,178.09/2,238.42
6. Step 6: Final answer
   x = 1,409.11