Finding the Third Proportional to 64,309 and 139,350

Step by Step Solution

1. Step 1: Write the proportion equation
   64,309 : 139,350 = 139,350 : x
2. Step 2: Convert to fraction form
   64,309/139,350 = 139,350/x
3. Step 3: Cross multiply
   64,309x = 139,350 × 139,350
4. Step 4: Simplify right side
   64,309x = 19,418,422,500
5. Step 5: Solve for x
   x = 19,418,422,500/64,309
6. Step 6: Final answer
   x = 301,954.98