Finding the Fourth Proportional to 284,661.74, 426,647.33 and 209,081.06

Step by Step Solution

1. Step 1: Write the proportion equation
   284,661.74 : 426,647.33 = 209,081.06 : x
2. Step 2: Convert to fraction form
   284,661.74/426,647.33 = 209,081.06/x
3. Step 3: Cross multiply
   284,661.74x = 426,647.33 × 209,081.06
4. Step 4: Simplify right side
   284,661.74x = 89,203,876,002.57
5. Step 5: Solve for x
   x = 89,203,876,002.57/284,661.74
6. Step 6: Final answer
   x = 313,367.99