Finding the Fourth Proportional to 519,196.94, 716,816.15 and 398,105.62

Step by Step Solution

1. Step 1: Write the proportion equation
   519,196.94 : 716,816.15 = 398,105.62 : x
2. Step 2: Convert to fraction form
   519,196.94/716,816.15 = 398,105.62/x
3. Step 3: Cross multiply
   519,196.94x = 716,816.15 × 398,105.62
4. Step 4: Simplify right side
   519,196.94x = 285,368,537,821.76
5. Step 5: Solve for x
   x = 285,368,537,821.76/519,196.94
6. Step 6: Final answer
   x = 549,634.48