Finding the Third Proportional to 64,959.75 and 139,590

Step by Step Solution

1. Step 1: Write the proportion equation
   64,959.75 : 139,590 = 139,590 : x
2. Step 2: Convert to fraction form
   64,959.75/139,590 = 139,590/x
3. Step 3: Cross multiply
   64,959.75x = 139,590 × 139,590
4. Step 4: Simplify right side
   64,959.75x = 19,485,368,100
5. Step 5: Solve for x
   x = 19,485,368,100/64,959.75
6. Step 6: Final answer
   x = 299,960.64