Finding the Fourth Proportional to 1,696.72, 2,540.10 and 1,287.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,696.72 : 2,540.10 = 1,287.46 : x
2. Step 2: Convert to fraction form
   1,696.72/2,540.10 = 1,287.46/x
3. Step 3: Cross multiply
   1,696.72x = 2,540.10 × 1,287.46
4. Step 4: Simplify right side
   1,696.72x = 3,270,277.15
5. Step 5: Solve for x
   x = 3,270,277.15/1,696.72
6. Step 6: Final answer
   x = 1,927.41