Finding the Fourth Proportional to 2,654.88, 3,982.91 and 899.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,654.88 : 3,982.91 = 899.78 : x
2. Step 2: Convert to fraction form
   2,654.88/3,982.91 = 899.78/x
3. Step 3: Cross multiply
   2,654.88x = 3,982.91 × 899.78
4. Step 4: Simplify right side
   2,654.88x = 3,583,742.76
5. Step 5: Solve for x
   x = 3,583,742.76/2,654.88
6. Step 6: Final answer
   x = 1,349.87