Finding the Third Proportional to 64,681.50 and 139,569

Step by Step Solution

1. Step 1: Write the proportion equation
   64,681.50 : 139,569 = 139,569 : x
2. Step 2: Convert to fraction form
   64,681.50/139,569 = 139,569/x
3. Step 3: Cross multiply
   64,681.50x = 139,569 × 139,569
4. Step 4: Simplify right side
   64,681.50x = 19,479,505,761
5. Step 5: Solve for x
   x = 19,479,505,761/64,681.50
6. Step 6: Final answer
   x = 301,160.39