Finding the Fourth Proportional to 1,647.08, 2,272.88 and 900.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,647.08 : 2,272.88 = 900.89 : x
2. Step 2: Convert to fraction form
   1,647.08/2,272.88 = 900.89/x
3. Step 3: Cross multiply
   1,647.08x = 2,272.88 × 900.89
4. Step 4: Simplify right side
   1,647.08x = 2,047,614.86
5. Step 5: Solve for x
   x = 2,047,614.86/1,647.08
6. Step 6: Final answer
   x = 1,243.18