Finding the Fourth Proportional to 1,191.24, 1,643.90 and 694.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.24 : 1,643.90 = 694.18 : x
2. Step 2: Convert to fraction form
   1,191.24/1,643.90 = 694.18/x
3. Step 3: Cross multiply
   1,191.24x = 1,643.90 × 694.18
4. Step 4: Simplify right side
   1,191.24x = 1,141,162.50
5. Step 5: Solve for x
   x = 1,141,162.50/1,191.24
6. Step 6: Final answer
   x = 957.96