Finding the Fourth Proportional to 1,131.05, 1,695.67 and 1,039.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.05 : 1,695.67 = 1,039.93 : x
2. Step 2: Convert to fraction form
   1,131.05/1,695.67 = 1,039.93/x
3. Step 3: Cross multiply
   1,131.05x = 1,695.67 × 1,039.93
4. Step 4: Simplify right side
   1,131.05x = 1,763,378.10
5. Step 5: Solve for x
   x = 1,763,378.10/1,131.05
6. Step 6: Final answer
   x = 1,559.06