Finding the Third Proportional to 18,353.81 and 40,078.69

Step by Step Solution

1. Step 1: Write the proportion equation
   18,353.81 : 40,078.69 = 40,078.69 : x
2. Step 2: Convert to fraction form
   18,353.81/40,078.69 = 40,078.69/x
3. Step 3: Cross multiply
   18,353.81x = 40,078.69 × 40,078.69
4. Step 4: Simplify right side
   18,353.81x = 1,606,301,191.72
5. Step 5: Solve for x
   x = 1,606,301,191.72/18,353.81
6. Step 6: Final answer
   x = 87,518.67