Finding the Fourth Proportional to 805,499.91, 1,111,566.38 and 442,923.39

Step by Step Solution

1. Step 1: Write the proportion equation
   805,499.91 : 1,111,566.38 = 442,923.39 : x
2. Step 2: Convert to fraction form
   805,499.91/1,111,566.38 = 442,923.39/x
3. Step 3: Cross multiply
   805,499.91x = 1,111,566.38 × 442,923.39
4. Step 4: Simplify right side
   805,499.91x = 492,338,747,025.01
5. Step 5: Solve for x
   x = 492,338,747,025.01/805,499.91
6. Step 6: Final answer
   x = 611,221.36