Finding the Fourth Proportional to 586,348.72, 809,162.78 and 318,076.72

Step by Step Solution

1. Step 1: Write the proportion equation
   586,348.72 : 809,162.78 = 318,076.72 : x
2. Step 2: Convert to fraction form
   586,348.72/809,162.78 = 318,076.72/x
3. Step 3: Cross multiply
   586,348.72x = 809,162.78 × 318,076.72
4. Step 4: Simplify right side
   586,348.72x = 257,375,843,008.48
5. Step 5: Solve for x
   x = 257,375,843,008.48/586,348.72
6. Step 6: Final answer
   x = 438,946.71