Finding the Third Proportional to 42,959 and 65,720.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,959 : 65,720.50 = 65,720.50 : x
2. Step 2: Convert to fraction form
   42,959/65,720.50 = 65,720.50/x
3. Step 3: Cross multiply
   42,959x = 65,720.50 × 65,720.50
4. Step 4: Simplify right side
   42,959x = 4,319,184,120.25
5. Step 5: Solve for x
   x = 4,319,184,120.25/42,959
6. Step 6: Final answer
   x = 100,542.01