Finding the Fourth Proportional to 1,298.47, 1,791.80 and 738.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.47 : 1,791.80 = 738.83 : x
2. Step 2: Convert to fraction form
   1,298.47/1,791.80 = 738.83/x
3. Step 3: Cross multiply
   1,298.47x = 1,791.80 × 738.83
4. Step 4: Simplify right side
   1,298.47x = 1,323,839.26
5. Step 5: Solve for x
   x = 1,323,839.26/1,298.47
6. Step 6: Final answer
   x = 1,019.54