Finding the Fourth Proportional to 2,382.99, 3,288.78 and 1,388.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.99 : 3,288.78 = 1,388.73 : x
2. Step 2: Convert to fraction form
   2,382.99/3,288.78 = 1,388.73/x
3. Step 3: Cross multiply
   2,382.99x = 3,288.78 × 1,388.73
4. Step 4: Simplify right side
   2,382.99x = 4,567,227.45
5. Step 5: Solve for x
   x = 4,567,227.45/2,382.99
6. Step 6: Final answer
   x = 1,916.60