Finding the Fourth Proportional to 2,180.74, 3,271.92 and 1,011.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.74 : 3,271.92 = 1,011.31 : x
2. Step 2: Convert to fraction form
   2,180.74/3,271.92 = 1,011.31/x
3. Step 3: Cross multiply
   2,180.74x = 3,271.92 × 1,011.31
4. Step 4: Simplify right side
   2,180.74x = 3,308,925.42
5. Step 5: Solve for x
   x = 3,308,925.42/2,180.74
6. Step 6: Final answer
   x = 1,517.34