Finding the Third Proportional to 7,681 and 17,986.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,681 : 17,986.50 = 17,986.50 : x
2. Step 2: Convert to fraction form
   7,681/17,986.50 = 17,986.50/x
3. Step 3: Cross multiply
   7,681x = 17,986.50 × 17,986.50
4. Step 4: Simplify right side
   7,681x = 323,514,182.25
5. Step 5: Solve for x
   x = 323,514,182.25/7,681
6. Step 6: Final answer
   x = 42,118.76