Finding the Third Proportional to 18,503.72 and 40,697.72

Step by Step Solution

1. Step 1: Write the proportion equation
   18,503.72 : 40,697.72 = 40,697.72 : x
2. Step 2: Convert to fraction form
   18,503.72/40,697.72 = 40,697.72/x
3. Step 3: Cross multiply
   18,503.72x = 40,697.72 × 40,697.72
4. Step 4: Simplify right side
   18,503.72x = 1,656,304,311.45
5. Step 5: Solve for x
   x = 1,656,304,311.45/18,503.72
6. Step 6: Final answer
   x = 89,511.97