Finding the Third Proportional to 64,931 and 139,726

Step by Step Solution

1. Step 1: Write the proportion equation
   64,931 : 139,726 = 139,726 : x
2. Step 2: Convert to fraction form
   64,931/139,726 = 139,726/x
3. Step 3: Cross multiply
   64,931x = 139,726 × 139,726
4. Step 4: Simplify right side
   64,931x = 19,523,355,076
5. Step 5: Solve for x
   x = 19,523,355,076/64,931
6. Step 6: Final answer
   x = 300,678.49