Finding the Fourth Proportional to 490,591.72, 735,271.98 and 209,778.76

Step by Step Solution

1. Step 1: Write the proportion equation
   490,591.72 : 735,271.98 = 209,778.76 : x
2. Step 2: Convert to fraction form
   490,591.72/735,271.98 = 209,778.76/x
3. Step 3: Cross multiply
   490,591.72x = 735,271.98 × 209,778.76
4. Step 4: Simplify right side
   490,591.72x = 154,244,444,227.15
5. Step 5: Solve for x
   x = 154,244,444,227.15/490,591.72
6. Step 6: Final answer
   x = 314,404.91