Finding the Fourth Proportional to 587,131.37, 810,227.55 and 345,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   587,131.37 : 810,227.55 = 345,429.50 : x
2. Step 2: Convert to fraction form
   587,131.37/810,227.55 = 345,429.50/x
3. Step 3: Cross multiply
   587,131.37x = 810,227.55 × 345,429.50
4. Step 4: Simplify right side
   587,131.37x = 279,876,493,431.59
5. Step 5: Solve for x
   x = 279,876,493,431.59/587,131.37
6. Step 6: Final answer
   x = 476,684.62