Finding the Fourth Proportional to 677,791.78, 1,015,978.23 and 228,357.34

Step by Step Solution

1. Step 1: Write the proportion equation
   677,791.78 : 1,015,978.23 = 228,357.34 : x
2. Step 2: Convert to fraction form
   677,791.78/1,015,978.23 = 228,357.34/x
3. Step 3: Cross multiply
   677,791.78x = 1,015,978.23 × 228,357.34
4. Step 4: Simplify right side
   677,791.78x = 232,006,086,100.71
5. Step 5: Solve for x
   x = 232,006,086,100.71/677,791.78
6. Step 6: Final answer
   x = 342,296.99