Finding the Fourth Proportional to 587,196.88, 810,327.24 and 318,926.80

Step by Step Solution

1. Step 1: Write the proportion equation
   587,196.88 : 810,327.24 = 318,926.80 : x
2. Step 2: Convert to fraction form
   587,196.88/810,327.24 = 318,926.80/x
3. Step 3: Cross multiply
   587,196.88x = 810,327.24 × 318,926.80
4. Step 4: Simplify right side
   587,196.88x = 258,435,073,606.03
5. Step 5: Solve for x
   x = 258,435,073,606.03/587,196.88
6. Step 6: Final answer
   x = 440,116.56