Finding the Fourth Proportional to 1,119.02, 1,687.52 and 1,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,119.02 : 1,687.52 = 1,111.72 : x
2. Step 2: Convert to fraction form
   1,119.02/1,687.52 = 1,111.72/x
3. Step 3: Cross multiply
   1,119.02x = 1,687.52 × 1,111.72
4. Step 4: Simplify right side
   1,119.02x = 1,876,049.73
5. Step 5: Solve for x
   x = 1,876,049.73/1,119.02
6. Step 6: Final answer
   x = 1,676.51