Finding the Fourth Proportional to 2,039.66, 3,061.76 and 1,905.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.66 : 3,061.76 = 1,905.81 : x
2. Step 2: Convert to fraction form
   2,039.66/3,061.76 = 1,905.81/x
3. Step 3: Cross multiply
   2,039.66x = 3,061.76 × 1,905.81
4. Step 4: Simplify right side
   2,039.66x = 5,835,123.30
5. Step 5: Solve for x
   x = 5,835,123.30/2,039.66
6. Step 6: Final answer
   x = 2,860.84