Finding the Fourth Proportional to 865,619.89, 1,194,556.61 and 498,089.73

Step by Step Solution

1. Step 1: Write the proportion equation
   865,619.89 : 1,194,556.61 = 498,089.73 : x
2. Step 2: Convert to fraction form
   865,619.89/1,194,556.61 = 498,089.73/x
3. Step 3: Cross multiply
   865,619.89x = 1,194,556.61 × 498,089.73
4. Step 4: Simplify right side
   865,619.89x = 594,996,380,308.86
5. Step 5: Solve for x
   x = 594,996,380,308.86/865,619.89
6. Step 6: Final answer
   x = 687,364.50