Finding the Fourth Proportional to 3,788.66, 5,685.89 and 1,939.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,788.66 : 5,685.89 = 1,939.62 : x
2. Step 2: Convert to fraction form
   3,788.66/5,685.89 = 1,939.62/x
3. Step 3: Cross multiply
   3,788.66x = 5,685.89 × 1,939.62
4. Step 4: Simplify right side
   3,788.66x = 11,028,470.81
5. Step 5: Solve for x
   x = 11,028,470.81/3,788.66
6. Step 6: Final answer
   x = 2,910.91