Finding the Fourth Proportional to 1,359,918.72, 2,040,111.36 and 413,383.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359,918.72 : 2,040,111.36 = 413,383.68 : x
2. Step 2: Convert to fraction form
   1,359,918.72/2,040,111.36 = 413,383.68/x
3. Step 3: Cross multiply
   1,359,918.72x = 2,040,111.36 × 413,383.68
4. Step 4: Simplify right side
   1,359,918.72x = 843,348,741,606.61
5. Step 5: Solve for x
   x = 843,348,741,606.61/1,359,918.72
6. Step 6: Final answer
   x = 620,146.43