Finding the Fourth Proportional to 1,017.91, 1,525.58 and 554.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.91 : 1,525.58 = 554.72 : x
2. Step 2: Convert to fraction form
   1,017.91/1,525.58 = 554.72/x
3. Step 3: Cross multiply
   1,017.91x = 1,525.58 × 554.72
4. Step 4: Simplify right side
   1,017.91x = 846,266.96
5. Step 5: Solve for x
   x = 846,266.96/1,017.91
6. Step 6: Final answer
   x = 831.38