Finding the Fourth Proportional to 1,298.08, 1,791.28 and 738.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.08 : 1,791.28 = 738.69 : x
2. Step 2: Convert to fraction form
   1,298.08/1,791.28 = 738.69/x
3. Step 3: Cross multiply
   1,298.08x = 1,791.28 × 738.69
4. Step 4: Simplify right side
   1,298.08x = 1,323,189.82
5. Step 5: Solve for x
   x = 1,323,189.82/1,298.08
6. Step 6: Final answer
   x = 1,019.34