Finding the Fourth Proportional to 487,111.10, 729,629.85 and 404,167.10

Step by Step Solution

1. Step 1: Write the proportion equation
   487,111.10 : 729,629.85 = 404,167.10 : x
2. Step 2: Convert to fraction form
   487,111.10/729,629.85 = 404,167.10/x
3. Step 3: Cross multiply
   487,111.10x = 729,629.85 × 404,167.10
4. Step 4: Simplify right side
   487,111.10x = 294,892,380,547.94
5. Step 5: Solve for x
   x = 294,892,380,547.94/487,111.10
6. Step 6: Final answer
   x = 605,390.39