Finding the Fourth Proportional to 630,846.72, 945,300.94 and 428,179.26

Step by Step Solution

1. Step 1: Write the proportion equation
   630,846.72 : 945,300.94 = 428,179.26 : x
2. Step 2: Convert to fraction form
   630,846.72/945,300.94 = 428,179.26/x
3. Step 3: Cross multiply
   630,846.72x = 945,300.94 × 428,179.26
4. Step 4: Simplify right side
   630,846.72x = 404,758,256,966.50
5. Step 5: Solve for x
   x = 404,758,256,966.50/630,846.72
6. Step 6: Final answer
   x = 641,611.10