Finding the Third Proportional to 111,369 and 172,711.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,369 : 172,711.50 = 172,711.50 : x
2. Step 2: Convert to fraction form
   111,369/172,711.50 = 172,711.50/x
3. Step 3: Cross multiply
   111,369x = 172,711.50 × 172,711.50
4. Step 4: Simplify right side
   111,369x = 29,829,262,232.25
5. Step 5: Solve for x
   x = 29,829,262,232.25/111,369
6. Step 6: Final answer
   x = 267,841.70