Finding the Third Proportional to 62,608 and 139,213

Step by Step Solution

1. Step 1: Write the proportion equation
   62,608 : 139,213 = 139,213 : x
2. Step 2: Convert to fraction form
   62,608/139,213 = 139,213/x
3. Step 3: Cross multiply
   62,608x = 139,213 × 139,213
4. Step 4: Simplify right side
   62,608x = 19,380,259,369
5. Step 5: Solve for x
   x = 19,380,259,369/62,608
6. Step 6: Final answer
   x = 309,549.25