Finding the Third Proportional to 2,776.78 and 4,317.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,776.78 : 4,317.05 = 4,317.05 : x
2. Step 2: Convert to fraction form
   2,776.78/4,317.05 = 4,317.05/x
3. Step 3: Cross multiply
   2,776.78x = 4,317.05 × 4,317.05
4. Step 4: Simplify right side
   2,776.78x = 18,636,893.72
5. Step 5: Solve for x
   x = 18,636,893.72/2,776.78
6. Step 6: Final answer
   x = 6,711.69