Finding the Fourth Proportional to 2,039.15, 3,061 and 1,905.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.15 : 3,061 = 1,905.30 : x
2. Step 2: Convert to fraction form
   2,039.15/3,061 = 1,905.30/x
3. Step 3: Cross multiply
   2,039.15x = 3,061 × 1,905.30
4. Step 4: Simplify right side
   2,039.15x = 5,832,123.30
5. Step 5: Solve for x
   x = 5,832,123.30/2,039.15
6. Step 6: Final answer
   x = 2,860.08