Finding the Fourth Proportional to 2,087.48, 3,131.28 and 548.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.48 : 3,131.28 = 548.52 : x
2. Step 2: Convert to fraction form
   2,087.48/3,131.28 = 548.52/x
3. Step 3: Cross multiply
   2,087.48x = 3,131.28 × 548.52
4. Step 4: Simplify right side
   2,087.48x = 1,717,569.71
5. Step 5: Solve for x
   x = 1,717,569.71/2,087.48
6. Step 6: Final answer
   x = 822.80