Finding the Fourth Proportional to 1,398.49, 1,929.27 and 1,119.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.49 : 1,929.27 = 1,119.12 : x
2. Step 2: Convert to fraction form
   1,398.49/1,929.27 = 1,119.12/x
3. Step 3: Cross multiply
   1,398.49x = 1,929.27 × 1,119.12
4. Step 4: Simplify right side
   1,398.49x = 2,159,075.31
5. Step 5: Solve for x
   x = 2,159,075.31/1,398.49
6. Step 6: Final answer
   x = 1,543.86