Finding the Fourth Proportional to 589,429.50, 813,412.71 and 321,157.50

Step by Step Solution

1. Step 1: Write the proportion equation
   589,429.50 : 813,412.71 = 321,157.50 : x
2. Step 2: Convert to fraction form
   589,429.50/813,412.71 = 321,157.50/x
3. Step 3: Cross multiply
   589,429.50x = 813,412.71 × 321,157.50
4. Step 4: Simplify right side
   589,429.50x = 261,233,592,411.83
5. Step 5: Solve for x
   x = 261,233,592,411.83/589,429.50
6. Step 6: Final answer
   x = 443,197.35