Finding the Fourth Proportional to 1,398.04, 1,929.34 and 838.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.04 : 1,929.34 = 838.32 : x
2. Step 2: Convert to fraction form
   1,398.04/1,929.34 = 838.32/x
3. Step 3: Cross multiply
   1,398.04x = 1,929.34 × 838.32
4. Step 4: Simplify right side
   1,398.04x = 1,617,404.31
5. Step 5: Solve for x
   x = 1,617,404.31/1,398.04
6. Step 6: Final answer
   x = 1,156.91