Finding the Fourth Proportional to 1,191.70, 1,644.15 and 693.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.70 : 1,644.15 = 693.94 : x
2. Step 2: Convert to fraction form
   1,191.70/1,644.15 = 693.94/x
3. Step 3: Cross multiply
   1,191.70x = 1,644.15 × 693.94
4. Step 4: Simplify right side
   1,191.70x = 1,140,941.45
5. Step 5: Solve for x
   x = 1,140,941.45/1,191.70
6. Step 6: Final answer
   x = 957.41