Finding the Fourth Proportional to 469,854.72, 648,138.24 and 308,736

Step by Step Solution

1. Step 1: Write the proportion equation
   469,854.72 : 648,138.24 = 308,736 : x
2. Step 2: Convert to fraction form
   469,854.72/648,138.24 = 308,736/x
3. Step 3: Cross multiply
   469,854.72x = 648,138.24 × 308,736
4. Step 4: Simplify right side
   469,854.72x = 200,103,607,664.64
5. Step 5: Solve for x
   x = 200,103,607,664.64/469,854.72
6. Step 6: Final answer
   x = 425,884.00