Finding the Third Proportional to 253,890 and 372,978

Step by Step Solution

1. Step 1: Write the proportion equation
   253,890 : 372,978 = 372,978 : x
2. Step 2: Convert to fraction form
   253,890/372,978 = 372,978/x
3. Step 3: Cross multiply
   253,890x = 372,978 × 372,978
4. Step 4: Simplify right side
   253,890x = 139,112,588,484
5. Step 5: Solve for x
   x = 139,112,588,484/253,890
6. Step 6: Final answer
   x = 547,924.65