Finding the Fourth Proportional to 2,654.90, 3,979.59 and 899.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,654.90 : 3,979.59 = 899.33 : x
2. Step 2: Convert to fraction form
   2,654.90/3,979.59 = 899.33/x
3. Step 3: Cross multiply
   2,654.90x = 3,979.59 × 899.33
4. Step 4: Simplify right side
   2,654.90x = 3,578,944.78
5. Step 5: Solve for x
   x = 3,578,944.78/2,654.90
6. Step 6: Final answer
   x = 1,348.06