Finding the Third Proportional to 111,019.50 and 169,290

Step by Step Solution

1. Step 1: Write the proportion equation
   111,019.50 : 169,290 = 169,290 : x
2. Step 2: Convert to fraction form
   111,019.50/169,290 = 169,290/x
3. Step 3: Cross multiply
   111,019.50x = 169,290 × 169,290
4. Step 4: Simplify right side
   111,019.50x = 28,659,104,100
5. Step 5: Solve for x
   x = 28,659,104,100/111,019.50
6. Step 6: Final answer
   x = 258,144.78