Finding the Fourth Proportional to 1,190.76, 1,643.40 and 693.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,190.76 : 1,643.40 = 693.42 : x
2. Step 2: Convert to fraction form
   1,190.76/1,643.40 = 693.42/x
3. Step 3: Cross multiply
   1,190.76x = 1,643.40 × 693.42
4. Step 4: Simplify right side
   1,190.76x = 1,139,566.43
5. Step 5: Solve for x
   x = 1,139,566.43/1,190.76
6. Step 6: Final answer
   x = 957.01