Finding the Fourth Proportional to 1,148.10, 1,723.59 and 1,142.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148.10 : 1,723.59 = 1,142.85 : x
2. Step 2: Convert to fraction form
   1,148.10/1,723.59 = 1,142.85/x
3. Step 3: Cross multiply
   1,148.10x = 1,723.59 × 1,142.85
4. Step 4: Simplify right side
   1,148.10x = 1,969,804.83
5. Step 5: Solve for x
   x = 1,969,804.83/1,148.10
6. Step 6: Final answer
   x = 1,715.71