Finding the Third Proportional to 111,256.50 and 172,590

Step by Step Solution

1. Step 1: Write the proportion equation
   111,256.50 : 172,590 = 172,590 : x
2. Step 2: Convert to fraction form
   111,256.50/172,590 = 172,590/x
3. Step 3: Cross multiply
   111,256.50x = 172,590 × 172,590
4. Step 4: Simplify right side
   111,256.50x = 29,787,308,100
5. Step 5: Solve for x
   x = 29,787,308,100/111,256.50
6. Step 6: Final answer
   x = 267,735.44