Finding the Third Proportional to 64,557.75 and 139,835.63

Step by Step Solution

1. Step 1: Write the proportion equation
   64,557.75 : 139,835.63 = 139,835.63 : x
2. Step 2: Convert to fraction form
   64,557.75/139,835.63 = 139,835.63/x
3. Step 3: Cross multiply
   64,557.75x = 139,835.63 × 139,835.63
4. Step 4: Simplify right side
   64,557.75x = 19,554,002,019.14
5. Step 5: Solve for x
   x = 19,554,002,019.14/64,557.75
6. Step 6: Final answer
   x = 302,891.63