Finding the Third Proportional to 36,317.91 and 78,667.78

Step by Step Solution

1. Step 1: Write the proportion equation
   36,317.91 : 78,667.78 = 78,667.78 : x
2. Step 2: Convert to fraction form
   36,317.91/78,667.78 = 78,667.78/x
3. Step 3: Cross multiply
   36,317.91x = 78,667.78 × 78,667.78
4. Step 4: Simplify right side
   36,317.91x = 6,188,619,806.80
5. Step 5: Solve for x
   x = 6,188,619,806.80/36,317.91
6. Step 6: Final answer
   x = 170,401.34