Finding the Fourth Proportional to 828,791.27, 1,143,049.61 and 488,931.47

Step by Step Solution

1. Step 1: Write the proportion equation
   828,791.27 : 1,143,049.61 = 488,931.47 : x
2. Step 2: Convert to fraction form
   828,791.27/1,143,049.61 = 488,931.47/x
3. Step 3: Cross multiply
   828,791.27x = 1,143,049.61 × 488,931.47
4. Step 4: Simplify right side
   828,791.27x = 558,872,923,143.50
5. Step 5: Solve for x
   x = 558,872,923,143.50/828,791.27
6. Step 6: Final answer
   x = 674,322.89