Finding the Fourth Proportional to 2,114.30, 3,171.65 and 554.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.30 : 3,171.65 = 554.31 : x
2. Step 2: Convert to fraction form
   2,114.30/3,171.65 = 554.31/x
3. Step 3: Cross multiply
   2,114.30x = 3,171.65 × 554.31
4. Step 4: Simplify right side
   2,114.30x = 1,758,074.54
5. Step 5: Solve for x
   x = 1,758,074.54/2,114.30
6. Step 6: Final answer
   x = 831.52