Finding the Third Proportional to 111,649.50 and 170,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,649.50 : 170,086.50 = 170,086.50 : x
2. Step 2: Convert to fraction form
   111,649.50/170,086.50 = 170,086.50/x
3. Step 3: Cross multiply
   111,649.50x = 170,086.50 × 170,086.50
4. Step 4: Simplify right side
   111,649.50x = 28,929,417,482.25
5. Step 5: Solve for x
   x = 28,929,417,482.25/111,649.50
6. Step 6: Final answer
   x = 259,109.24