Finding the Fourth Proportional to 728,081.94, 1,092,155.69 and 278,686.25

Step by Step Solution

1. Step 1: Write the proportion equation
   728,081.94 : 1,092,155.69 = 278,686.25 : x
2. Step 2: Convert to fraction form
   728,081.94/1,092,155.69 = 278,686.25/x
3. Step 3: Cross multiply
   728,081.94x = 1,092,155.69 × 278,686.25
4. Step 4: Simplify right side
   728,081.94x = 304,368,773,662.26
5. Step 5: Solve for x
   x = 304,368,773,662.26/728,081.94
6. Step 6: Final answer
   x = 418,041.92