Finding the Third Proportional to 401,919 and 545,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   401,919 : 545,818.50 = 545,818.50 : x
2. Step 2: Convert to fraction form
   401,919/545,818.50 = 545,818.50/x
3. Step 3: Cross multiply
   401,919x = 545,818.50 × 545,818.50
4. Step 4: Simplify right side
   401,919x = 297,917,834,942.25
5. Step 5: Solve for x
   x = 297,917,834,942.25/401,919
6. Step 6: Final answer
   x = 741,238.50