Finding the Fourth Proportional to 1,975.89, 2,728.89 and 1,315.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,975.89 : 2,728.89 = 1,315.54 : x
2. Step 2: Convert to fraction form
   1,975.89/2,728.89 = 1,315.54/x
3. Step 3: Cross multiply
   1,975.89x = 2,728.89 × 1,315.54
4. Step 4: Simplify right side
   1,975.89x = 3,589,967.36
5. Step 5: Solve for x
   x = 3,589,967.36/1,975.89
6. Step 6: Final answer
   x = 1,816.88