Finding the Fourth Proportional to 2,139.28, 2,952.22 and 1,182.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.28 : 2,952.22 = 1,182.16 : x
2. Step 2: Convert to fraction form
   2,139.28/2,952.22 = 1,182.16/x
3. Step 3: Cross multiply
   2,139.28x = 2,952.22 × 1,182.16
4. Step 4: Simplify right side
   2,139.28x = 3,489,996.40
5. Step 5: Solve for x
   x = 3,489,996.40/2,139.28
6. Step 6: Final answer
   x = 1,631.39