Finding the Third Proportional to 42,939.50 and 64,879

Step by Step Solution

1. Step 1: Write the proportion equation
   42,939.50 : 64,879 = 64,879 : x
2. Step 2: Convert to fraction form
   42,939.50/64,879 = 64,879/x
3. Step 3: Cross multiply
   42,939.50x = 64,879 × 64,879
4. Step 4: Simplify right side
   42,939.50x = 4,209,284,641
5. Step 5: Solve for x
   x = 4,209,284,641/42,939.50
6. Step 6: Final answer
   x = 98,028.26