Finding the Fourth Proportional to 2,160.50, 3,238.01 and 1,380.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.50 : 3,238.01 = 1,380.20 : x
2. Step 2: Convert to fraction form
   2,160.50/3,238.01 = 1,380.20/x
3. Step 3: Cross multiply
   2,160.50x = 3,238.01 × 1,380.20
4. Step 4: Simplify right side
   2,160.50x = 4,469,096.76
5. Step 5: Solve for x
   x = 4,469,096.76/2,160.50
6. Step 6: Final answer
   x = 2,068.55