Finding the Fourth Proportional to 2,675.31, 4,014.64 and 1,288.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,675.31 : 4,014.64 = 1,288.80 : x
2. Step 2: Convert to fraction form
   2,675.31/4,014.64 = 1,288.80/x
3. Step 3: Cross multiply
   2,675.31x = 4,014.64 × 1,288.80
4. Step 4: Simplify right side
   2,675.31x = 5,174,068.03
5. Step 5: Solve for x
   x = 5,174,068.03/2,675.31
6. Step 6: Final answer
   x = 1,934.01