Finding the Third Proportional to 342,464 and 545,404

Step by Step Solution

1. Step 1: Write the proportion equation
   342,464 : 545,404 = 545,404 : x
2. Step 2: Convert to fraction form
   342,464/545,404 = 545,404/x
3. Step 3: Cross multiply
   342,464x = 545,404 × 545,404
4. Step 4: Simplify right side
   342,464x = 297,465,523,216
5. Step 5: Solve for x
   x = 297,465,523,216/342,464
6. Step 6: Final answer
   x = 868,603.78