Finding the Fourth Proportional to 1,145.56, 1,725.40 and 1,045.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.56 : 1,725.40 = 1,045.68 : x
2. Step 2: Convert to fraction form
   1,145.56/1,725.40 = 1,045.68/x
3. Step 3: Cross multiply
   1,145.56x = 1,725.40 × 1,045.68
4. Step 4: Simplify right side
   1,145.56x = 1,804,216.27
5. Step 5: Solve for x
   x = 1,804,216.27/1,145.56
6. Step 6: Final answer
   x = 1,574.96