Finding the Fourth Proportional to 1,191.12, 1,644.41 and 1,066.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.12 : 1,644.41 = 1,066.49 : x
2. Step 2: Convert to fraction form
   1,191.12/1,644.41 = 1,066.49/x
3. Step 3: Cross multiply
   1,191.12x = 1,644.41 × 1,066.49
4. Step 4: Simplify right side
   1,191.12x = 1,753,733.27
5. Step 5: Solve for x
   x = 1,753,733.27/1,191.12
6. Step 6: Final answer
   x = 1,472.34