Finding the Fourth Proportional to 2,979.72, 4,471.61 and 1,031.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.72 : 4,471.61 = 1,031.91 : x
2. Step 2: Convert to fraction form
   2,979.72/4,471.61 = 1,031.91/x
3. Step 3: Cross multiply
   2,979.72x = 4,471.61 × 1,031.91
4. Step 4: Simplify right side
   2,979.72x = 4,614,277.15
5. Step 5: Solve for x
   x = 4,614,277.15/2,979.72
6. Step 6: Final answer
   x = 1,548.56