Finding the Fourth Proportional to 2,548.84, 3,820.83 and 816.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,548.84 : 3,820.83 = 816.28 : x
2. Step 2: Convert to fraction form
   2,548.84/3,820.83 = 816.28/x
3. Step 3: Cross multiply
   2,548.84x = 3,820.83 × 816.28
4. Step 4: Simplify right side
   2,548.84x = 3,118,867.11
5. Step 5: Solve for x
   x = 3,118,867.11/2,548.84
6. Step 6: Final answer
   x = 1,223.64