Finding the Third Proportional to 111,221.86 and 172,362.94

Step by Step Solution

1. Step 1: Write the proportion equation
   111,221.86 : 172,362.94 = 172,362.94 : x
2. Step 2: Convert to fraction form
   111,221.86/172,362.94 = 172,362.94/x
3. Step 3: Cross multiply
   111,221.86x = 172,362.94 × 172,362.94
4. Step 4: Simplify right side
   111,221.86x = 29,708,982,223.63
5. Step 5: Solve for x
   x = 29,708,982,223.63/111,221.86
6. Step 6: Final answer
   x = 267,114.60