Finding the Third Proportional to 172,890 and 375,300

Step by Step Solution

1. Step 1: Write the proportion equation
   172,890 : 375,300 = 375,300 : x
2. Step 2: Convert to fraction form
   172,890/375,300 = 375,300/x
3. Step 3: Cross multiply
   172,890x = 375,300 × 375,300
4. Step 4: Simplify right side
   172,890x = 140,850,090,000
5. Step 5: Solve for x
   x = 140,850,090,000/172,890
6. Step 6: Final answer
   x = 814,680.37