Finding the Fourth Proportional to 1,166.72, 1,741.49 and 1,069.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,166.72 : 1,741.49 = 1,069.31 : x
2. Step 2: Convert to fraction form
   1,166.72/1,741.49 = 1,069.31/x
3. Step 3: Cross multiply
   1,166.72x = 1,741.49 × 1,069.31
4. Step 4: Simplify right side
   1,166.72x = 1,862,178.62
5. Step 5: Solve for x
   x = 1,862,178.62/1,166.72
6. Step 6: Final answer
   x = 1,596.09