Finding the Third Proportional to 401,892 and 545,820

Step by Step Solution

1. Step 1: Write the proportion equation
   401,892 : 545,820 = 545,820 : x
2. Step 2: Convert to fraction form
   401,892/545,820 = 545,820/x
3. Step 3: Cross multiply
   401,892x = 545,820 × 545,820
4. Step 4: Simplify right side
   401,892x = 297,919,472,400
5. Step 5: Solve for x
   x = 297,919,472,400/401,892
6. Step 6: Final answer
   x = 741,292.37