Finding the Fourth Proportional to 2,157.71, 2,976.48 and 1,318.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157.71 : 2,976.48 = 1,318.82 : x
2. Step 2: Convert to fraction form
   2,157.71/2,976.48 = 1,318.82/x
3. Step 3: Cross multiply
   2,157.71x = 2,976.48 × 1,318.82
4. Step 4: Simplify right side
   2,157.71x = 3,925,426.47
5. Step 5: Solve for x
   x = 3,925,426.47/2,157.71
6. Step 6: Final answer
   x = 1,819.26