Finding the Fourth Proportional to 1,945.54, 2,915.96 and 712.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.54 : 2,915.96 = 712.28 : x
2. Step 2: Convert to fraction form
   1,945.54/2,915.96 = 712.28/x
3. Step 3: Cross multiply
   1,945.54x = 2,915.96 × 712.28
4. Step 4: Simplify right side
   1,945.54x = 2,076,983.72
5. Step 5: Solve for x
   x = 2,076,983.72/1,945.54
6. Step 6: Final answer
   x = 1,067.56