Finding the Third Proportional to 80,485.50 and 109,309.88

Step by Step Solution

1. Step 1: Write the proportion equation
   80,485.50 : 109,309.88 = 109,309.88 : x
2. Step 2: Convert to fraction form
   80,485.50/109,309.88 = 109,309.88/x
3. Step 3: Cross multiply
   80,485.50x = 109,309.88 × 109,309.88
4. Step 4: Simplify right side
   80,485.50x = 11,948,648,772.52
5. Step 5: Solve for x
   x = 11,948,648,772.52/80,485.50
6. Step 6: Final answer
   x = 148,457.16