Finding the Fourth Proportional to 1,191.16, 1,643.77 and 693.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.16 : 1,643.77 = 693.83 : x
2. Step 2: Convert to fraction form
   1,191.16/1,643.77 = 693.83/x
3. Step 3: Cross multiply
   1,191.16x = 1,643.77 × 693.83
4. Step 4: Simplify right side
   1,191.16x = 1,140,493.47
5. Step 5: Solve for x
   x = 1,140,493.47/1,191.16
6. Step 6: Final answer
   x = 957.47