Finding the Fourth Proportional to 1,131.18, 1,685.24 and 1,076.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.18 : 1,685.24 = 1,076.10 : x
2. Step 2: Convert to fraction form
   1,131.18/1,685.24 = 1,076.10/x
3. Step 3: Cross multiply
   1,131.18x = 1,685.24 × 1,076.10
4. Step 4: Simplify right side
   1,131.18x = 1,813,481.38
5. Step 5: Solve for x
   x = 1,813,481.38/1,131.18
6. Step 6: Final answer
   x = 1,603.18