Finding the Third Proportional to 111,345 and 172,441.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,345 : 172,441.50 = 172,441.50 : x
2. Step 2: Convert to fraction form
   111,345/172,441.50 = 172,441.50/x
3. Step 3: Cross multiply
   111,345x = 172,441.50 × 172,441.50
4. Step 4: Simplify right side
   111,345x = 29,736,070,922.25
5. Step 5: Solve for x
   x = 29,736,070,922.25/111,345
6. Step 6: Final answer
   x = 267,062.47