Finding the Fourth Proportional to 2,168.55, 3,012.71 and 2,148.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.55 : 3,012.71 = 2,148.30 : x
2. Step 2: Convert to fraction form
   2,168.55/3,012.71 = 2,148.30/x
3. Step 3: Cross multiply
   2,168.55x = 3,012.71 × 2,148.30
4. Step 4: Simplify right side
   2,168.55x = 6,472,194.15
5. Step 5: Solve for x
   x = 6,472,194.15/2,168.55
6. Step 6: Final answer
   x = 2,984.57