Finding the Fourth Proportional to 404,322.30, 558,144.16 and 261,152.18

Step by Step Solution

1. Step 1: Write the proportion equation
   404,322.30 : 558,144.16 = 261,152.18 : x
2. Step 2: Convert to fraction form
   404,322.30/558,144.16 = 261,152.18/x
3. Step 3: Cross multiply
   404,322.30x = 558,144.16 × 261,152.18
4. Step 4: Simplify right side
   404,322.30x = 145,760,564,138.27
5. Step 5: Solve for x
   x = 145,760,564,138.27/404,322.30
6. Step 6: Final answer
   x = 360,505.87