Finding the Fourth Proportional to 398,522.37, 597,117.89 and 279,981.51

Step by Step Solution

1. Step 1: Write the proportion equation
   398,522.37 : 597,117.89 = 279,981.51 : x
2. Step 2: Convert to fraction form
   398,522.37/597,117.89 = 279,981.51/x
3. Step 3: Cross multiply
   398,522.37x = 597,117.89 × 279,981.51
4. Step 4: Simplify right side
   398,522.37x = 167,181,966,950.98
5. Step 5: Solve for x
   x = 167,181,966,950.98/398,522.37
6. Step 6: Final answer
   x = 419,504.59