Finding the Fourth Proportional to 2,675.48, 4,012.61 and 1,288.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,675.48 : 4,012.61 = 1,288.10 : x
2. Step 2: Convert to fraction form
   2,675.48/4,012.61 = 1,288.10/x
3. Step 3: Cross multiply
   2,675.48x = 4,012.61 × 1,288.10
4. Step 4: Simplify right side
   2,675.48x = 5,168,646.53
5. Step 5: Solve for x
   x = 5,168,646.53/2,675.48
6. Step 6: Final answer
   x = 1,931.86