Finding the Fourth Proportional to 404,638.40, 565,444 and 404,638.40

Step by Step Solution

1. Step 1: Write the proportion equation
   404,638.40 : 565,444 = 404,638.40 : x
2. Step 2: Convert to fraction form
   404,638.40/565,444 = 404,638.40/x
3. Step 3: Cross multiply
   404,638.40x = 565,444 × 404,638.40
4. Step 4: Simplify right side
   404,638.40x = 228,800,355,449.60
5. Step 5: Solve for x
   x = 228,800,355,449.60/404,638.40
6. Step 6: Final answer
   x = 565,444