Finding the Fourth Proportional to 404,563.60, 558,164.64 and 261,407.98

Step by Step Solution

1. Step 1: Write the proportion equation
   404,563.60 : 558,164.64 = 261,407.98 : x
2. Step 2: Convert to fraction form
   404,563.60/558,164.64 = 261,407.98/x
3. Step 3: Cross multiply
   404,563.60x = 558,164.64 × 261,407.98
4. Step 4: Simplify right side
   404,563.60x = 145,908,691,049.83
5. Step 5: Solve for x
   x = 145,908,691,049.83/404,563.60
6. Step 6: Final answer
   x = 360,656.99