Finding the Third Proportional to 42,723.50 and 64,721.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,723.50 : 64,721.50 = 64,721.50 : x
2. Step 2: Convert to fraction form
   42,723.50/64,721.50 = 64,721.50/x
3. Step 3: Cross multiply
   42,723.50x = 64,721.50 × 64,721.50
4. Step 4: Simplify right side
   42,723.50x = 4,188,872,562.25
5. Step 5: Solve for x
   x = 4,188,872,562.25/42,723.50
6. Step 6: Final answer
   x = 98,046.10