Finding the Fourth Proportional to 3,618.69, 5,428.22 and 1,021.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,618.69 : 5,428.22 = 1,021.83 : x
2. Step 2: Convert to fraction form
   3,618.69/5,428.22 = 1,021.83/x
3. Step 3: Cross multiply
   3,618.69x = 5,428.22 × 1,021.83
4. Step 4: Simplify right side
   3,618.69x = 5,546,718.04
5. Step 5: Solve for x
   x = 5,546,718.04/3,618.69
6. Step 6: Final answer
   x = 1,532.80