Finding the Third Proportional to 64,256.25 and 139,238.25

Step by Step Solution

1. Step 1: Write the proportion equation
   64,256.25 : 139,238.25 = 139,238.25 : x
2. Step 2: Convert to fraction form
   64,256.25/139,238.25 = 139,238.25/x
3. Step 3: Cross multiply
   64,256.25x = 139,238.25 × 139,238.25
4. Step 4: Simplify right side
   64,256.25x = 19,387,290,263.06
5. Step 5: Solve for x
   x = 19,387,290,263.06/64,256.25
6. Step 6: Final answer
   x = 301,718.36