Finding the Fourth Proportional to 587,439, 810,667.98 and 319,167

Step by Step Solution

1. Step 1: Write the proportion equation
   587,439 : 810,667.98 = 319,167 : x
2. Step 2: Convert to fraction form
   587,439/810,667.98 = 319,167/x
3. Step 3: Cross multiply
   587,439x = 810,667.98 × 319,167
4. Step 4: Simplify right side
   587,439x = 258,738,467,172.66
5. Step 5: Solve for x
   x = 258,738,467,172.66/587,439
6. Step 6: Final answer
   x = 440,451.63