Finding the Fourth Proportional to 589,258.72, 813,177.12 and 320,986.72

Step by Step Solution

1. Step 1: Write the proportion equation
   589,258.72 : 813,177.12 = 320,986.72 : x
2. Step 2: Convert to fraction form
   589,258.72/813,177.12 = 320,986.72/x
3. Step 3: Cross multiply
   589,258.72x = 813,177.12 × 320,986.72
4. Step 4: Simplify right side
   589,258.72x = 261,019,056,527.85
5. Step 5: Solve for x
   x = 261,019,056,527.85/589,258.72
6. Step 6: Final answer
   x = 442,961.72