Finding the Fourth Proportional to 2,217.32, 3,061.21 and 1,971.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.32 : 3,061.21 = 1,971.30 : x
2. Step 2: Convert to fraction form
   2,217.32/3,061.21 = 1,971.30/x
3. Step 3: Cross multiply
   2,217.32x = 3,061.21 × 1,971.30
4. Step 4: Simplify right side
   2,217.32x = 6,034,563.27
5. Step 5: Solve for x
   x = 6,034,563.27/2,217.32
6. Step 6: Final answer
   x = 2,721.56