Finding the Third Proportional to 40,243.50 and 87,408

Step by Step Solution

1. Step 1: Write the proportion equation
   40,243.50 : 87,408 = 87,408 : x
2. Step 2: Convert to fraction form
   40,243.50/87,408 = 87,408/x
3. Step 3: Cross multiply
   40,243.50x = 87,408 × 87,408
4. Step 4: Simplify right side
   40,243.50x = 7,640,158,464
5. Step 5: Solve for x
   x = 7,640,158,464/40,243.50
6. Step 6: Final answer
   x = 189,848.26