Finding the Fourth Proportional to 859,105.05, 1,185,694.25 and 618,185.13

Step by Step Solution

1. Step 1: Write the proportion equation
   859,105.05 : 1,185,694.25 = 618,185.13 : x
2. Step 2: Convert to fraction form
   859,105.05/1,185,694.25 = 618,185.13/x
3. Step 3: Cross multiply
   859,105.05x = 1,185,694.25 × 618,185.13
4. Step 4: Simplify right side
   859,105.05x = 732,978,550,985.58
5. Step 5: Solve for x
   x = 732,978,550,985.58/859,105.05
6. Step 6: Final answer
   x = 853,188.50