Finding the Third Proportional to 3,154.78 and 4,739.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,154.78 : 4,739.72 = 4,739.72 : x
2. Step 2: Convert to fraction form
   3,154.78/4,739.72 = 4,739.72/x
3. Step 3: Cross multiply
   3,154.78x = 4,739.72 × 4,739.72
4. Step 4: Simplify right side
   3,154.78x = 22,464,933.83
5. Step 5: Solve for x
   x = 22,464,933.83/3,154.78
6. Step 6: Final answer
   x = 7,120.92