Finding the Third Proportional to 64,131.75 and 139,213.88

Step by Step Solution

1. Step 1: Write the proportion equation
   64,131.75 : 139,213.88 = 139,213.88 : x
2. Step 2: Convert to fraction form
   64,131.75/139,213.88 = 139,213.88/x
3. Step 3: Cross multiply
   64,131.75x = 139,213.88 × 139,213.88
4. Step 4: Simplify right side
   64,131.75x = 19,380,502,992.52
5. Step 5: Solve for x
   x = 19,380,502,992.52/64,131.75
6. Step 6: Final answer
   x = 302,198.26