Finding the Third Proportional to 64,558.50 and 139,314

Step by Step Solution

1. Step 1: Write the proportion equation
   64,558.50 : 139,314 = 139,314 : x
2. Step 2: Convert to fraction form
   64,558.50/139,314 = 139,314/x
3. Step 3: Cross multiply
   64,558.50x = 139,314 × 139,314
4. Step 4: Simplify right side
   64,558.50x = 19,408,390,596
5. Step 5: Solve for x
   x = 19,408,390,596/64,558.50
6. Step 6: Final answer
   x = 300,632.61