Finding the Fourth Proportional to 1,946.78, 2,686.46 and 1,107.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,946.78 : 2,686.46 = 1,107.48 : x
2. Step 2: Convert to fraction form
   1,946.78/2,686.46 = 1,107.48/x
3. Step 3: Cross multiply
   1,946.78x = 2,686.46 × 1,107.48
4. Step 4: Simplify right side
   1,946.78x = 2,975,200.72
5. Step 5: Solve for x
   x = 2,975,200.72/1,946.78
6. Step 6: Final answer
   x = 1,528.27