Finding the Third Proportional to 62,790 and 137,388

Step by Step Solution

1. Step 1: Write the proportion equation
   62,790 : 137,388 = 137,388 : x
2. Step 2: Convert to fraction form
   62,790/137,388 = 137,388/x
3. Step 3: Cross multiply
   62,790x = 137,388 × 137,388
4. Step 4: Simplify right side
   62,790x = 18,875,462,544
5. Step 5: Solve for x
   x = 18,875,462,544/62,790
6. Step 6: Final answer
   x = 300,612.56