Finding the Fourth Proportional to 2,157.20, 2,976.18 and 1,411.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.20 : 2,976.18 = 1,411.59 : x
2. Step 2: Convert to fraction form
   2,157.20/2,976.18 = 1,411.59/x
3. Step 3: Cross multiply
   2,157.20x = 2,976.18 × 1,411.59
4. Step 4: Simplify right side
   2,157.20x = 4,201,151.79
5. Step 5: Solve for x
   x = 4,201,151.79/2,157.20
6. Step 6: Final answer
   x = 1,947.50