Finding the Third Proportional to 90,661.50 and 104,809.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,661.50 : 104,809.50 = 104,809.50 : x
2. Step 2: Convert to fraction form
   90,661.50/104,809.50 = 104,809.50/x
3. Step 3: Cross multiply
   90,661.50x = 104,809.50 × 104,809.50
4. Step 4: Simplify right side
   90,661.50x = 10,985,031,290.25
5. Step 5: Solve for x
   x = 10,985,031,290.25/90,661.50
6. Step 6: Final answer
   x = 121,165.34