Finding the Third Proportional to 168,216 and 253,040

Step by Step Solution

1. Step 1: Write the proportion equation
   168,216 : 253,040 = 253,040 : x
2. Step 2: Convert to fraction form
   168,216/253,040 = 253,040/x
3. Step 3: Cross multiply
   168,216x = 253,040 × 253,040
4. Step 4: Simplify right side
   168,216x = 64,029,241,600
5. Step 5: Solve for x
   x = 64,029,241,600/168,216
6. Step 6: Final answer
   x = 380,637.05