Finding the Fourth Proportional to 3,116.20, 4,677.42 and 2,239.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,116.20 : 4,677.42 = 2,239.72 : x
2. Step 2: Convert to fraction form
   3,116.20/4,677.42 = 2,239.72/x
3. Step 3: Cross multiply
   3,116.20x = 4,677.42 × 2,239.72
4. Step 4: Simplify right side
   3,116.20x = 10,476,111.12
5. Step 5: Solve for x
   x = 10,476,111.12/3,116.20
6. Step 6: Final answer
   x = 3,361.82