Finding the Third Proportional to 39,678 and 53,826.75

Step by Step Solution

1. Step 1: Write the proportion equation
   39,678 : 53,826.75 = 53,826.75 : x
2. Step 2: Convert to fraction form
   39,678/53,826.75 = 53,826.75/x
3. Step 3: Cross multiply
   39,678x = 53,826.75 × 53,826.75
4. Step 4: Simplify right side
   39,678x = 2,897,319,015.56
5. Step 5: Solve for x
   x = 2,897,319,015.56/39,678
6. Step 6: Final answer
   x = 73,020.79