Finding the Fourth Proportional to 1,131.21, 1,695.56 and 554.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.21 : 1,695.56 = 554.49 : x
2. Step 2: Convert to fraction form
   1,131.21/1,695.56 = 554.49/x
3. Step 3: Cross multiply
   1,131.21x = 1,695.56 × 554.49
4. Step 4: Simplify right side
   1,131.21x = 940,168.29
5. Step 5: Solve for x
   x = 940,168.29/1,131.21
6. Step 6: Final answer
   x = 831.12