Finding the Third Proportional to 64,426 and 139,580

Step by Step Solution

1. Step 1: Write the proportion equation
   64,426 : 139,580 = 139,580 : x
2. Step 2: Convert to fraction form
   64,426/139,580 = 139,580/x
3. Step 3: Cross multiply
   64,426x = 139,580 × 139,580
4. Step 4: Simplify right side
   64,426x = 19,482,576,400
5. Step 5: Solve for x
   x = 19,482,576,400/64,426
6. Step 6: Final answer
   x = 302,402.39