Finding the Fourth Proportional to 1,131.91, 1,698.23 and 554.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.91 : 1,698.23 = 554.38 : x
2. Step 2: Convert to fraction form
   1,131.91/1,698.23 = 554.38/x
3. Step 3: Cross multiply
   1,131.91x = 1,698.23 × 554.38
4. Step 4: Simplify right side
   1,131.91x = 941,461.89
5. Step 5: Solve for x
   x = 941,461.89/1,131.91
6. Step 6: Final answer
   x = 831.75