Finding the Fourth Proportional to 1,204,383.69, 1,661,780.28 and 687,972.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204,383.69 : 1,661,780.28 = 687,972.51 : x
2. Step 2: Convert to fraction form
   1,204,383.69/1,661,780.28 = 687,972.51/x
3. Step 3: Cross multiply
   1,204,383.69x = 1,661,780.28 × 687,972.51
4. Step 4: Simplify right side
   1,204,383.69x = 1,143,259,150,300.10
5. Step 5: Solve for x
   x = 1,143,259,150,300.10/1,204,383.69
6. Step 6: Final answer
   x = 949,248.28