Finding the Fourth Proportional to 3,722.06, 5,139.90 and 2,398.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,722.06 : 5,139.90 = 2,398.06 : x
2. Step 2: Convert to fraction form
   3,722.06/5,139.90 = 2,398.06/x
3. Step 3: Cross multiply
   3,722.06x = 5,139.90 × 2,398.06
4. Step 4: Simplify right side
   3,722.06x = 12,325,788.59
5. Step 5: Solve for x
   x = 12,325,788.59/3,722.06
6. Step 6: Final answer
   x = 3,311.55