Finding the Fourth Proportional to 2,180.62, 3,271.47 and 947.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.62 : 3,271.47 = 947.71 : x
2. Step 2: Convert to fraction form
   2,180.62/3,271.47 = 947.71/x
3. Step 3: Cross multiply
   2,180.62x = 3,271.47 × 947.71
4. Step 4: Simplify right side
   2,180.62x = 3,100,404.83
5. Step 5: Solve for x
   x = 3,100,404.83/2,180.62
6. Step 6: Final answer
   x = 1,421.80