Finding the Fourth Proportional to 2,749.21, 4,122.89 and 899.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,749.21 : 4,122.89 = 899.89 : x
2. Step 2: Convert to fraction form
   2,749.21/4,122.89 = 899.89/x
3. Step 3: Cross multiply
   2,749.21x = 4,122.89 × 899.89
4. Step 4: Simplify right side
   2,749.21x = 3,710,147.48
5. Step 5: Solve for x
   x = 3,710,147.48/2,749.21
6. Step 6: Final answer
   x = 1,349.53