Finding the Fourth Proportional to 630,818.82, 945,259.29 and 428,151.58

Step by Step Solution

1. Step 1: Write the proportion equation
   630,818.82 : 945,259.29 = 428,151.58 : x
2. Step 2: Convert to fraction form
   630,818.82/945,259.29 = 428,151.58/x
3. Step 3: Cross multiply
   630,818.82x = 945,259.29 × 428,151.58
4. Step 4: Simplify right side
   630,818.82x = 404,714,256,160.03
5. Step 5: Solve for x
   x = 404,714,256,160.03/630,818.82
6. Step 6: Final answer
   x = 641,569.72