Finding the Third Proportional to 118,857 and 252,978

Step by Step Solution

1. Step 1: Write the proportion equation
   118,857 : 252,978 = 252,978 : x
2. Step 2: Convert to fraction form
   118,857/252,978 = 252,978/x
3. Step 3: Cross multiply
   118,857x = 252,978 × 252,978
4. Step 4: Simplify right side
   118,857x = 63,997,868,484
5. Step 5: Solve for x
   x = 63,997,868,484/118,857
6. Step 6: Final answer
   x = 538,444.25