Finding the Fourth Proportional to 2,631.72, 3,946.38 and 899.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.72 : 3,946.38 = 899.16 : x
2. Step 2: Convert to fraction form
   2,631.72/3,946.38 = 899.16/x
3. Step 3: Cross multiply
   2,631.72x = 3,946.38 × 899.16
4. Step 4: Simplify right side
   2,631.72x = 3,548,427.04
5. Step 5: Solve for x
   x = 3,548,427.04/2,631.72
6. Step 6: Final answer
   x = 1,348.33