Finding the Fourth Proportional to 1,896.42, 2,615.78 and 1,647.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,896.42 : 2,615.78 = 1,647.30 : x
2. Step 2: Convert to fraction form
   1,896.42/2,615.78 = 1,647.30/x
3. Step 3: Cross multiply
   1,896.42x = 2,615.78 × 1,647.30
4. Step 4: Simplify right side
   1,896.42x = 4,308,979.06
5. Step 5: Solve for x
   x = 4,308,979.06/1,896.42
6. Step 6: Final answer
   x = 2,272.17