Finding the Fourth Proportional to 589,266.72, 813,188.16 and 320,994.72

Step by Step Solution

1. Step 1: Write the proportion equation
   589,266.72 : 813,188.16 = 320,994.72 : x
2. Step 2: Convert to fraction form
   589,266.72/813,188.16 = 320,994.72/x
3. Step 3: Cross multiply
   589,266.72x = 813,188.16 × 320,994.72
4. Step 4: Simplify right side
   589,266.72x = 261,029,105,726.52
5. Step 5: Solve for x
   x = 261,029,105,726.52/589,266.72
6. Step 6: Final answer
   x = 442,972.76