Finding the Fourth Proportional to 1,398.42, 1,929.81 and 760.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.42 : 1,929.81 = 760.38 : x
2. Step 2: Convert to fraction form
   1,398.42/1,929.81 = 760.38/x
3. Step 3: Cross multiply
   1,398.42x = 1,929.81 × 760.38
4. Step 4: Simplify right side
   1,398.42x = 1,467,388.93
5. Step 5: Solve for x
   x = 1,467,388.93/1,398.42
6. Step 6: Final answer
   x = 1,049.32