Finding the Fourth Proportional to 2,781.32, 4,171.23 and 1,221.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,781.32 : 4,171.23 = 1,221.71 : x
2. Step 2: Convert to fraction form
   2,781.32/4,171.23 = 1,221.71/x
3. Step 3: Cross multiply
   2,781.32x = 4,171.23 × 1,221.71
4. Step 4: Simplify right side
   2,781.32x = 5,096,012.55
5. Step 5: Solve for x
   x = 5,096,012.55/2,781.32
6. Step 6: Final answer
   x = 1,832.23