Finding the Third Proportional to 113,312 and 172,700

Step by Step Solution

1. Step 1: Write the proportion equation
   113,312 : 172,700 = 172,700 : x
2. Step 2: Convert to fraction form
   113,312/172,700 = 172,700/x
3. Step 3: Cross multiply
   113,312x = 172,700 × 172,700
4. Step 4: Simplify right side
   113,312x = 29,825,290,000
5. Step 5: Solve for x
   x = 29,825,290,000/113,312
6. Step 6: Final answer
   x = 263,213.87