Finding the Fourth Proportional to 477,978.22, 659,604.63 and 263,113.57

Step by Step Solution

1. Step 1: Write the proportion equation
   477,978.22 : 659,604.63 = 263,113.57 : x
2. Step 2: Convert to fraction form
   477,978.22/659,604.63 = 263,113.57/x
3. Step 3: Cross multiply
   477,978.22x = 659,604.63 × 263,113.57
4. Step 4: Simplify right side
   477,978.22x = 173,550,928,987.83
5. Step 5: Solve for x
   x = 173,550,928,987.83/477,978.22
6. Step 6: Final answer
   x = 363,093.80