Finding the Fourth Proportional to 1,398.74, 1,929.01 and 1,045.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.74 : 1,929.01 = 1,045.52 : x
2. Step 2: Convert to fraction form
   1,398.74/1,929.01 = 1,045.52/x
3. Step 3: Cross multiply
   1,398.74x = 1,929.01 × 1,045.52
4. Step 4: Simplify right side
   1,398.74x = 2,016,818.54
5. Step 5: Solve for x
   x = 2,016,818.54/1,398.74
6. Step 6: Final answer
   x = 1,441.88