Finding the Fourth Proportional to 447,145.40, 626,833 and 447,145.40

Step by Step Solution

1. Step 1: Write the proportion equation
   447,145.40 : 626,833 = 447,145.40 : x
2. Step 2: Convert to fraction form
   447,145.40/626,833 = 447,145.40/x
3. Step 3: Cross multiply
   447,145.40x = 626,833 × 447,145.40
4. Step 4: Simplify right side
   447,145.40x = 280,285,492,518.20
5. Step 5: Solve for x
   x = 280,285,492,518.20/447,145.40
6. Step 6: Final answer
   x = 626,833