Finding the Fourth Proportional to 713,155.10, 984,008.59 and 422,638.61

Step by Step Solution

1. Step 1: Write the proportion equation
   713,155.10 : 984,008.59 = 422,638.61 : x
2. Step 2: Convert to fraction form
   713,155.10/984,008.59 = 422,638.61/x
3. Step 3: Cross multiply
   713,155.10x = 984,008.59 × 422,638.61
4. Step 4: Simplify right side
   713,155.10x = 415,880,016,729.02
5. Step 5: Solve for x
   x = 415,880,016,729.02/713,155.10
6. Step 6: Final answer
   x = 583,155.08