Finding the Third Proportional to 172,038 and 252,978

Step by Step Solution

1. Step 1: Write the proportion equation
   172,038 : 252,978 = 252,978 : x
2. Step 2: Convert to fraction form
   172,038/252,978 = 252,978/x
3. Step 3: Cross multiply
   172,038x = 252,978 × 252,978
4. Step 4: Simplify right side
   172,038x = 63,997,868,484
5. Step 5: Solve for x
   x = 63,997,868,484/172,038
6. Step 6: Final answer
   x = 371,998.45