Finding the Fourth Proportional to 1,298.09, 1,791.41 and 738.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.09 : 1,791.41 = 738.61 : x
2. Step 2: Convert to fraction form
   1,298.09/1,791.41 = 738.61/x
3. Step 3: Cross multiply
   1,298.09x = 1,791.41 × 738.61
4. Step 4: Simplify right side
   1,298.09x = 1,323,153.34
5. Step 5: Solve for x
   x = 1,323,153.34/1,298.09
6. Step 6: Final answer
   x = 1,019.31