Finding the Fourth Proportional to 1,190.96, 1,643.37 and 693.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,190.96 : 1,643.37 = 693.69 : x
2. Step 2: Convert to fraction form
   1,190.96/1,643.37 = 693.69/x
3. Step 3: Cross multiply
   1,190.96x = 1,643.37 × 693.69
4. Step 4: Simplify right side
   1,190.96x = 1,139,989.34
5. Step 5: Solve for x
   x = 1,139,989.34/1,190.96
6. Step 6: Final answer
   x = 957.20