Finding the Fourth Proportional to 404,816.13, 607,434.34 and 165,105.90

Step by Step Solution

1. Step 1: Write the proportion equation
   404,816.13 : 607,434.34 = 165,105.90 : x
2. Step 2: Convert to fraction form
   404,816.13/607,434.34 = 165,105.90/x
3. Step 3: Cross multiply
   404,816.13x = 607,434.34 × 165,105.90
4. Step 4: Simplify right side
   404,816.13x = 100,290,990,359.43
5. Step 5: Solve for x
   x = 100,290,990,359.43/404,816.13
6. Step 6: Final answer
   x = 247,744.55