Finding the Third Proportional to 138,645 and 300,600

Step by Step Solution

1. Step 1: Write the proportion equation
   138,645 : 300,600 = 300,600 : x
2. Step 2: Convert to fraction form
   138,645/300,600 = 300,600/x
3. Step 3: Cross multiply
   138,645x = 300,600 × 300,600
4. Step 4: Simplify right side
   138,645x = 90,360,360,000
5. Step 5: Solve for x
   x = 90,360,360,000/138,645
6. Step 6: Final answer
   x = 651,739.05