Finding the Fourth Proportional to 1,131.80, 1,695.24 and 697.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.80 : 1,695.24 = 697.64 : x
2. Step 2: Convert to fraction form
   1,131.80/1,695.24 = 697.64/x
3. Step 3: Cross multiply
   1,131.80x = 1,695.24 × 697.64
4. Step 4: Simplify right side
   1,131.80x = 1,182,667.23
5. Step 5: Solve for x
   x = 1,182,667.23/1,131.80
6. Step 6: Final answer
   x = 1,044.94