Finding the Third Proportional to 30,987.50 and 63,809

Step by Step Solution

1. Step 1: Write the proportion equation
   30,987.50 : 63,809 = 63,809 : x
2. Step 2: Convert to fraction form
   30,987.50/63,809 = 63,809/x
3. Step 3: Cross multiply
   30,987.50x = 63,809 × 63,809
4. Step 4: Simplify right side
   30,987.50x = 4,071,588,481
5. Step 5: Solve for x
   x = 4,071,588,481/30,987.50
6. Step 6: Final answer
   x = 131,394.55