Finding the Fourth Proportional to 987,986.78, 1,362,669.50 and 850,399.88

Step by Step Solution

1. Step 1: Write the proportion equation
   987,986.78 : 1,362,669.50 = 850,399.88 : x
2. Step 2: Convert to fraction form
   987,986.78/1,362,669.50 = 850,399.88/x
3. Step 3: Cross multiply
   987,986.78x = 1,362,669.50 × 850,399.88
4. Step 4: Simplify right side
   987,986.78x = 1,158,813,978,434.33
5. Step 5: Solve for x
   x = 1,158,813,978,434.33/987,986.78
6. Step 6: Final answer
   x = 1,172,904.33