Finding the Third Proportional to 64,929 and 139,578

Step by Step Solution

1. Step 1: Write the proportion equation
   64,929 : 139,578 = 139,578 : x
2. Step 2: Convert to fraction form
   64,929/139,578 = 139,578/x
3. Step 3: Cross multiply
   64,929x = 139,578 × 139,578
4. Step 4: Simplify right side
   64,929x = 19,482,018,084
5. Step 5: Solve for x
   x = 19,482,018,084/64,929
6. Step 6: Final answer
   x = 300,051.10