Finding the Fourth Proportional to 2,002.28, 2,983.30 and 1,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.28 : 2,983.30 = 1,890.50 : x
2. Step 2: Convert to fraction form
   2,002.28/2,983.30 = 1,890.50/x
3. Step 3: Cross multiply
   2,002.28x = 2,983.30 × 1,890.50
4. Step 4: Simplify right side
   2,002.28x = 5,639,928.65
5. Step 5: Solve for x
   x = 5,639,928.65/2,002.28
6. Step 6: Final answer
   x = 2,816.75