Finding the Third Proportional to 64,212.75 and 69,943.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,212.75 : 69,943.50 = 69,943.50 : x
2. Step 2: Convert to fraction form
   64,212.75/69,943.50 = 69,943.50/x
3. Step 3: Cross multiply
   64,212.75x = 69,943.50 × 69,943.50
4. Step 4: Simplify right side
   64,212.75x = 4,892,093,192.25
5. Step 5: Solve for x
   x = 4,892,093,192.25/64,212.75
6. Step 6: Final answer
   x = 76,185.70