Finding the Fourth Proportional to 2,748.56, 4,123.31 and 899.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,748.56 : 4,123.31 = 899.15 : x
2. Step 2: Convert to fraction form
   2,748.56/4,123.31 = 899.15/x
3. Step 3: Cross multiply
   2,748.56x = 4,123.31 × 899.15
4. Step 4: Simplify right side
   2,748.56x = 3,707,449.07
5. Step 5: Solve for x
   x = 3,707,449.07/2,748.56
6. Step 6: Final answer
   x = 1,348.87