Finding the Fourth Proportional to 1,188,561.22, 1,782,196.71 and 539,781.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188,561.22 : 1,782,196.71 = 539,781.10 : x
2. Step 2: Convert to fraction form
   1,188,561.22/1,782,196.71 = 539,781.10/x
3. Step 3: Cross multiply
   1,188,561.22x = 1,782,196.71 × 539,781.10
4. Step 4: Simplify right side
   1,188,561.22x = 961,996,100,540.18
5. Step 5: Solve for x
   x = 961,996,100,540.18/1,188,561.22
6. Step 6: Final answer
   x = 809,378.67