Finding the Fourth Proportional to 404,320.48, 558,141.60 and 261,150.35

Step by Step Solution

1. Step 1: Write the proportion equation
   404,320.48 : 558,141.60 = 261,150.35 : x
2. Step 2: Convert to fraction form
   404,320.48/558,141.60 = 261,150.35/x
3. Step 3: Cross multiply
   404,320.48x = 558,141.60 × 261,150.35
4. Step 4: Simplify right side
   404,320.48x = 145,758,874,189.56
5. Step 5: Solve for x
   x = 145,758,874,189.56/404,320.48
6. Step 6: Final answer
   x = 360,503.32