Finding the Fourth Proportional to 2,631.96, 3,945.24 and 1,899.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.96 : 3,945.24 = 1,899.72 : x
2. Step 2: Convert to fraction form
   2,631.96/3,945.24 = 1,899.72/x
3. Step 3: Cross multiply
   2,631.96x = 3,945.24 × 1,899.72
4. Step 4: Simplify right side
   2,631.96x = 7,494,851.33
5. Step 5: Solve for x
   x = 7,494,851.33/2,631.96
6. Step 6: Final answer
   x = 2,847.63