Finding the Third Proportional to 67,108.50 and 90,814.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,108.50 : 90,814.50 = 90,814.50 : x
2. Step 2: Convert to fraction form
   67,108.50/90,814.50 = 90,814.50/x
3. Step 3: Cross multiply
   67,108.50x = 90,814.50 × 90,814.50
4. Step 4: Simplify right side
   67,108.50x = 8,247,273,410.25
5. Step 5: Solve for x
   x = 8,247,273,410.25/67,108.50
6. Step 6: Final answer
   x = 122,894.62