Finding the Fourth Proportional to 2,256.48, 3,384.78 and 1,086.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.48 : 3,384.78 = 1,086.30 : x
2. Step 2: Convert to fraction form
   2,256.48/3,384.78 = 1,086.30/x
3. Step 3: Cross multiply
   2,256.48x = 3,384.78 × 1,086.30
4. Step 4: Simplify right side
   2,256.48x = 3,676,886.51
5. Step 5: Solve for x
   x = 3,676,886.51/2,256.48
6. Step 6: Final answer
   x = 1,629.48