Finding the Fourth Proportional to 2,471.63, 3,708.90 and 912.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,471.63 : 3,708.90 = 912.72 : x
2. Step 2: Convert to fraction form
   2,471.63/3,708.90 = 912.72/x
3. Step 3: Cross multiply
   2,471.63x = 3,708.90 × 912.72
4. Step 4: Simplify right side
   2,471.63x = 3,385,187.21
5. Step 5: Solve for x
   x = 3,385,187.21/2,471.63
6. Step 6: Final answer
   x = 1,369.62