Finding the Third Proportional to 64,878 and 139,758

Step by Step Solution

1. Step 1: Write the proportion equation
   64,878 : 139,758 = 139,758 : x
2. Step 2: Convert to fraction form
   64,878/139,758 = 139,758/x
3. Step 3: Cross multiply
   64,878x = 139,758 × 139,758
4. Step 4: Simplify right side
   64,878x = 19,532,298,564
5. Step 5: Solve for x
   x = 19,532,298,564/64,878
6. Step 6: Final answer
   x = 301,061.97