Finding the Third Proportional to 64,759.50 and 139,723.31

Step by Step Solution

1. Step 1: Write the proportion equation
   64,759.50 : 139,723.31 = 139,723.31 : x
2. Step 2: Convert to fraction form
   64,759.50/139,723.31 = 139,723.31/x
3. Step 3: Cross multiply
   64,759.50x = 139,723.31 × 139,723.31
4. Step 4: Simplify right side
   64,759.50x = 19,522,604,055.97
5. Step 5: Solve for x
   x = 19,522,604,055.97/64,759.50
6. Step 6: Final answer
   x = 301,463.17