Finding the Fourth Proportional to 1,397.88, 1,929.05 and 759.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.88 : 1,929.05 = 759.81 : x
2. Step 2: Convert to fraction form
   1,397.88/1,929.05 = 759.81/x
3. Step 3: Cross multiply
   1,397.88x = 1,929.05 × 759.81
4. Step 4: Simplify right side
   1,397.88x = 1,465,711.48
5. Step 5: Solve for x
   x = 1,465,711.48/1,397.88
6. Step 6: Final answer
   x = 1,048.53