Finding the Third Proportional to 39,756 and 55,719

Step by Step Solution

1. Step 1: Write the proportion equation
   39,756 : 55,719 = 55,719 : x
2. Step 2: Convert to fraction form
   39,756/55,719 = 55,719/x
3. Step 3: Cross multiply
   39,756x = 55,719 × 55,719
4. Step 4: Simplify right side
   39,756x = 3,104,606,961
5. Step 5: Solve for x
   x = 3,104,606,961/39,756
6. Step 6: Final answer
   x = 78,091.53