Finding the Fourth Proportional to 1,488.57, 2,054.12 and 899.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.57 : 2,054.12 = 899.43 : x
2. Step 2: Convert to fraction form
   1,488.57/2,054.12 = 899.43/x
3. Step 3: Cross multiply
   1,488.57x = 2,054.12 × 899.43
4. Step 4: Simplify right side
   1,488.57x = 1,847,537.15
5. Step 5: Solve for x
   x = 1,847,537.15/1,488.57
6. Step 6: Final answer
   x = 1,241.15