Finding the Fourth Proportional to 333,906.10, 499,661.90 and 289,081.62

Step by Step Solution

1. Step 1: Write the proportion equation
   333,906.10 : 499,661.90 = 289,081.62 : x
2. Step 2: Convert to fraction form
   333,906.10/499,661.90 = 289,081.62/x
3. Step 3: Cross multiply
   333,906.10x = 499,661.90 × 289,081.62
4. Step 4: Simplify right side
   333,906.10x = 144,443,071,142.93
5. Step 5: Solve for x
   x = 144,443,071,142.93/333,906.10
6. Step 6: Final answer
   x = 432,585.90