Finding the Fourth Proportional to 2,147.20, 2,965.11 and 1,361.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.20 : 2,965.11 = 1,361.50 : x
2. Step 2: Convert to fraction form
   2,147.20/2,965.11 = 1,361.50/x
3. Step 3: Cross multiply
   2,147.20x = 2,965.11 × 1,361.50
4. Step 4: Simplify right side
   2,147.20x = 4,036,997.27
5. Step 5: Solve for x
   x = 4,036,997.27/2,147.20
6. Step 6: Final answer
   x = 1,880.12