Finding the Third Proportional to 172,040 and 253,000

Step by Step Solution

1. Step 1: Write the proportion equation
   172,040 : 253,000 = 253,000 : x
2. Step 2: Convert to fraction form
   172,040/253,000 = 253,000/x
3. Step 3: Cross multiply
   172,040x = 253,000 × 253,000
4. Step 4: Simplify right side
   172,040x = 64,009,000,000
5. Step 5: Solve for x
   x = 64,009,000,000/172,040
6. Step 6: Final answer
   x = 372,058.82