Finding the Third Proportional to 40,291 and 56,638.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,291 : 56,638.50 = 56,638.50 : x
2. Step 2: Convert to fraction form
   40,291/56,638.50 = 56,638.50/x
3. Step 3: Cross multiply
   40,291x = 56,638.50 × 56,638.50
4. Step 4: Simplify right side
   40,291x = 3,207,919,682.25
5. Step 5: Solve for x
   x = 3,207,919,682.25/40,291
6. Step 6: Final answer
   x = 79,618.77