Finding the Fourth Proportional to 2,630.76, 3,945.96 and 899.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.76 : 3,945.96 = 899.16 : x
2. Step 2: Convert to fraction form
   2,630.76/3,945.96 = 899.16/x
3. Step 3: Cross multiply
   2,630.76x = 3,945.96 × 899.16
4. Step 4: Simplify right side
   2,630.76x = 3,548,049.39
5. Step 5: Solve for x
   x = 3,548,049.39/2,630.76
6. Step 6: Final answer
   x = 1,348.68