Finding the Fourth Proportional to 2,054.24, 3,081.72 and 899.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,054.24 : 3,081.72 = 899.72 : x
2. Step 2: Convert to fraction form
   2,054.24/3,081.72 = 899.72/x
3. Step 3: Cross multiply
   2,054.24x = 3,081.72 × 899.72
4. Step 4: Simplify right side
   2,054.24x = 2,772,685.12
5. Step 5: Solve for x
   x = 2,772,685.12/2,054.24
6. Step 6: Final answer
   x = 1,349.74