Finding the Fourth Proportional to 2,491.72, 3,736.32 and 847.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,491.72 : 3,736.32 = 847.72 : x
2. Step 2: Convert to fraction form
   2,491.72/3,736.32 = 847.72/x
3. Step 3: Cross multiply
   2,491.72x = 3,736.32 × 847.72
4. Step 4: Simplify right side
   2,491.72x = 3,167,353.19
5. Step 5: Solve for x
   x = 3,167,353.19/2,491.72
6. Step 6: Final answer
   x = 1,271.15