Finding the Third Proportional to 79,290 and 108,724.50

Step by Step Solution

1. Step 1: Write the proportion equation
   79,290 : 108,724.50 = 108,724.50 : x
2. Step 2: Convert to fraction form
   79,290/108,724.50 = 108,724.50/x
3. Step 3: Cross multiply
   79,290x = 108,724.50 × 108,724.50
4. Step 4: Simplify right side
   79,290x = 11,821,016,900.25
5. Step 5: Solve for x
   x = 11,821,016,900.25/79,290
6. Step 6: Final answer
   x = 149,085.85