Finding the Third Proportional to 18,991.50 and 40,742.38

Step by Step Solution

1. Step 1: Write the proportion equation
   18,991.50 : 40,742.38 = 40,742.38 : x
2. Step 2: Convert to fraction form
   18,991.50/40,742.38 = 40,742.38/x
3. Step 3: Cross multiply
   18,991.50x = 40,742.38 × 40,742.38
4. Step 4: Simplify right side
   18,991.50x = 1,659,941,120.64
5. Step 5: Solve for x
   x = 1,659,941,120.64/18,991.50
6. Step 6: Final answer
   x = 87,404.42