Finding the Fourth Proportional to 2,068.30, 3,103.44 and 1,288.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,068.30 : 3,103.44 = 1,288.09 : x
2. Step 2: Convert to fraction form
   2,068.30/3,103.44 = 1,288.09/x
3. Step 3: Cross multiply
   2,068.30x = 3,103.44 × 1,288.09
4. Step 4: Simplify right side
   2,068.30x = 3,997,510.03
5. Step 5: Solve for x
   x = 3,997,510.03/2,068.30
6. Step 6: Final answer
   x = 1,932.75