Finding the Fourth Proportional to 5,297.06, 7,976.55 and 3,920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,297.06 : 7,976.55 = 3,920.10 : x
2. Step 2: Convert to fraction form
   5,297.06/7,976.55 = 3,920.10/x
3. Step 3: Cross multiply
   5,297.06x = 7,976.55 × 3,920.10
4. Step 4: Simplify right side
   5,297.06x = 31,268,873.66
5. Step 5: Solve for x
   x = 31,268,873.66/5,297.06
6. Step 6: Final answer
   x = 5,903.07