Finding the Fourth Proportional to 1,646.28, 2,271.82 and 900.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,646.28 : 2,271.82 = 900.22 : x
2. Step 2: Convert to fraction form
   1,646.28/2,271.82 = 900.22/x
3. Step 3: Cross multiply
   1,646.28x = 2,271.82 × 900.22
4. Step 4: Simplify right side
   1,646.28x = 2,045,137.80
5. Step 5: Solve for x
   x = 2,045,137.80/1,646.28
6. Step 6: Final answer
   x = 1,242.28