Finding the Fourth Proportional to 1,080.59, 1,487.31 and 922.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.59 : 1,487.31 = 922.69 : x
2. Step 2: Convert to fraction form
   1,080.59/1,487.31 = 922.69/x
3. Step 3: Cross multiply
   1,080.59x = 1,487.31 × 922.69
4. Step 4: Simplify right side
   1,080.59x = 1,372,329.65
5. Step 5: Solve for x
   x = 1,372,329.65/1,080.59
6. Step 6: Final answer
   x = 1,269.98