Finding the Fourth Proportional to 1,608.02, 2,219.27 and 899.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.02 : 2,219.27 = 899.90 : x
2. Step 2: Convert to fraction form
   1,608.02/2,219.27 = 899.90/x
3. Step 3: Cross multiply
   1,608.02x = 2,219.27 × 899.90
4. Step 4: Simplify right side
   1,608.02x = 1,997,105.48
5. Step 5: Solve for x
   x = 1,997,105.48/1,608.02
6. Step 6: Final answer
   x = 1,241.97