Finding the Fourth Proportional to 1,028.58, 1,543.41 and 742.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028.58 : 1,543.41 = 742.38 : x
2. Step 2: Convert to fraction form
   1,028.58/1,543.41 = 742.38/x
3. Step 3: Cross multiply
   1,028.58x = 1,543.41 × 742.38
4. Step 4: Simplify right side
   1,028.58x = 1,145,796.72
5. Step 5: Solve for x
   x = 1,145,796.72/1,028.58
6. Step 6: Final answer
   x = 1,113.96