Finding the Third Proportional to 2,258.06 and 5,439.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.06 : 5,439.56 = 5,439.56 : x
2. Step 2: Convert to fraction form
   2,258.06/5,439.56 = 5,439.56/x
3. Step 3: Cross multiply
   2,258.06x = 5,439.56 × 5,439.56
4. Step 4: Simplify right side
   2,258.06x = 29,588,840.19
5. Step 5: Solve for x
   x = 29,588,840.19/2,258.06
6. Step 6: Final answer
   x = 13,103.64