Finding the Fourth Proportional to 1,076.10, 1,616.55 and 1,047.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.10 : 1,616.55 = 1,047.30 : x
2. Step 2: Convert to fraction form
   1,076.10/1,616.55 = 1,047.30/x
3. Step 3: Cross multiply
   1,076.10x = 1,616.55 × 1,047.30
4. Step 4: Simplify right side
   1,076.10x = 1,693,012.82
5. Step 5: Solve for x
   x = 1,693,012.82/1,076.10
6. Step 6: Final answer
   x = 1,573.29