Finding the Fourth Proportional to 978,717.81, 1,469,150.56 and 777,606.41

Step by Step Solution

1. Step 1: Write the proportion equation
   978,717.81 : 1,469,150.56 = 777,606.41 : x
2. Step 2: Convert to fraction form
   978,717.81/1,469,150.56 = 777,606.41/x
3. Step 3: Cross multiply
   978,717.81x = 1,469,150.56 × 777,606.41
4. Step 4: Simplify right side
   978,717.81x = 1,142,420,897,355.97
5. Step 5: Solve for x
   x = 1,142,420,897,355.97/978,717.81
6. Step 6: Final answer
   x = 1,167,262.81