Finding the Fourth Proportional to 490,978.56, 735,864 and 254,185.92

Step by Step Solution

1. Step 1: Write the proportion equation
   490,978.56 : 735,864 = 254,185.92 : x
2. Step 2: Convert to fraction form
   490,978.56/735,864 = 254,185.92/x
3. Step 3: Cross multiply
   490,978.56x = 735,864 × 254,185.92
4. Step 4: Simplify right side
   490,978.56x = 187,046,267,834.88
5. Step 5: Solve for x
   x = 187,046,267,834.88/490,978.56
6. Step 6: Final answer
   x = 380,966.26