Finding the Fourth Proportional to 616,315.89, 922,895.55 and 426,513.45

Step by Step Solution

1. Step 1: Write the proportion equation
   616,315.89 : 922,895.55 = 426,513.45 : x
2. Step 2: Convert to fraction form
   616,315.89/922,895.55 = 426,513.45/x
3. Step 3: Cross multiply
   616,315.89x = 922,895.55 × 426,513.45
4. Step 4: Simplify right side
   616,315.89x = 393,627,365,020.15
5. Step 5: Solve for x
   x = 393,627,365,020.15/616,315.89
6. Step 6: Final answer
   x = 638,677.94