Finding the Fourth Proportional to 648,930.72, 973,447.20 and 228,300.96

Step by Step Solution

1. Step 1: Write the proportion equation
   648,930.72 : 973,447.20 = 228,300.96 : x
2. Step 2: Convert to fraction form
   648,930.72/973,447.20 = 228,300.96/x
3. Step 3: Cross multiply
   648,930.72x = 973,447.20 × 228,300.96
4. Step 4: Simplify right side
   648,930.72x = 222,238,930,269.31
5. Step 5: Solve for x
   x = 222,238,930,269.31/648,930.72
6. Step 6: Final answer
   x = 342,469.42