Finding the Fourth Proportional to 587,131.18, 810,227.30 and 345,429.32

Step by Step Solution

1. Step 1: Write the proportion equation
   587,131.18 : 810,227.30 = 345,429.32 : x
2. Step 2: Convert to fraction form
   587,131.18/810,227.30 = 345,429.32/x
3. Step 3: Cross multiply
   587,131.18x = 810,227.30 × 345,429.32
4. Step 4: Simplify right side
   587,131.18x = 279,876,259,506.15
5. Step 5: Solve for x
   x = 279,876,259,506.15/587,131.18
6. Step 6: Final answer
   x = 476,684.38