Finding the Fourth Proportional to 861,620.72, 1,189,196.04 and 499,044.50

Step by Step Solution

1. Step 1: Write the proportion equation
   861,620.72 : 1,189,196.04 = 499,044.50 : x
2. Step 2: Convert to fraction form
   861,620.72/1,189,196.04 = 499,044.50/x
3. Step 3: Cross multiply
   861,620.72x = 1,189,196.04 × 499,044.50
4. Step 4: Simplify right side
   861,620.72x = 593,461,743,183.78
5. Step 5: Solve for x
   x = 593,461,743,183.78/861,620.72
6. Step 6: Final answer
   x = 688,773.76