Finding the Fourth Proportional to 1,646.15, 2,271.62 and 900.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,646.15 : 2,271.62 = 900.11 : x
2. Step 2: Convert to fraction form
   1,646.15/2,271.62 = 900.11/x
3. Step 3: Cross multiply
   1,646.15x = 2,271.62 × 900.11
4. Step 4: Simplify right side
   1,646.15x = 2,044,692.02
5. Step 5: Solve for x
   x = 2,044,692.02/1,646.15
6. Step 6: Final answer
   x = 1,242.11