Finding the Fourth Proportional to 2,173.86, 3,258.36 and 939.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.86 : 3,258.36 = 939.42 : x
2. Step 2: Convert to fraction form
   2,173.86/3,258.36 = 939.42/x
3. Step 3: Cross multiply
   2,173.86x = 3,258.36 × 939.42
4. Step 4: Simplify right side
   2,173.86x = 3,060,968.55
5. Step 5: Solve for x
   x = 3,060,968.55/2,173.86
6. Step 6: Final answer
   x = 1,408.08