Finding the Third Proportional to 65,386.75 and 138,620

Step by Step Solution

1. Step 1: Write the proportion equation
   65,386.75 : 138,620 = 138,620 : x
2. Step 2: Convert to fraction form
   65,386.75/138,620 = 138,620/x
3. Step 3: Cross multiply
   65,386.75x = 138,620 × 138,620
4. Step 4: Simplify right side
   65,386.75x = 19,215,504,400
5. Step 5: Solve for x
   x = 19,215,504,400/65,386.75
6. Step 6: Final answer
   x = 293,874.59