Finding the Fourth Proportional to 1,191.98, 1,645.39 and 694.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.98 : 1,645.39 = 694.78 : x
2. Step 2: Convert to fraction form
   1,191.98/1,645.39 = 694.78/x
3. Step 3: Cross multiply
   1,191.98x = 1,645.39 × 694.78
4. Step 4: Simplify right side
   1,191.98x = 1,143,180.00
5. Step 5: Solve for x
   x = 1,143,180.00/1,191.98
6. Step 6: Final answer
   x = 959.06