Finding the Third Proportional to 18,960 and 40,780.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,960 : 40,780.50 = 40,780.50 : x
2. Step 2: Convert to fraction form
   18,960/40,780.50 = 40,780.50/x
3. Step 3: Cross multiply
   18,960x = 40,780.50 × 40,780.50
4. Step 4: Simplify right side
   18,960x = 1,663,049,180.25
5. Step 5: Solve for x
   x = 1,663,049,180.25/18,960
6. Step 6: Final answer
   x = 87,713.56