Finding the Fourth Proportional to 1,075.28, 1,493.84 and 1,065.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.28 : 1,493.84 = 1,065.15 : x
2. Step 2: Convert to fraction form
   1,075.28/1,493.84 = 1,065.15/x
3. Step 3: Cross multiply
   1,075.28x = 1,493.84 × 1,065.15
4. Step 4: Simplify right side
   1,075.28x = 1,591,166.34
5. Step 5: Solve for x
   x = 1,591,166.34/1,075.28
6. Step 6: Final answer
   x = 1,479.78