Finding the Fourth Proportional to 1,393.03, 1,922.38 and 772.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.03 : 1,922.38 = 772.03 : x
2. Step 2: Convert to fraction form
   1,393.03/1,922.38 = 772.03/x
3. Step 3: Cross multiply
   1,393.03x = 1,922.38 × 772.03
4. Step 4: Simplify right side
   1,393.03x = 1,484,139.85
5. Step 5: Solve for x
   x = 1,484,139.85/1,393.03
6. Step 6: Final answer
   x = 1,065.40