Finding the Third Proportional to 30,810 and 65,300

Step by Step Solution

1. Step 1: Write the proportion equation
   30,810 : 65,300 = 65,300 : x
2. Step 2: Convert to fraction form
   30,810/65,300 = 65,300/x
3. Step 3: Cross multiply
   30,810x = 65,300 × 65,300
4. Step 4: Simplify right side
   30,810x = 4,264,090,000
5. Step 5: Solve for x
   x = 4,264,090,000/30,810
6. Step 6: Final answer
   x = 138,399.55