Finding the Fourth Proportional to 1,078,796.21, 1,617,773.31 and 404,509.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078,796.21 : 1,617,773.31 = 404,509.68 : x
2. Step 2: Convert to fraction form
   1,078,796.21/1,617,773.31 = 404,509.68/x
3. Step 3: Cross multiply
   1,078,796.21x = 1,617,773.31 × 404,509.68
4. Step 4: Simplify right side
   1,078,796.21x = 654,404,963,940.64
5. Step 5: Solve for x
   x = 654,404,963,940.64/1,078,796.21
6. Step 6: Final answer
   x = 606,606.66