Finding the Fourth Proportional to 1,080.33, 1,487.59 and 905.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.33 : 1,487.59 = 905.37 : x
2. Step 2: Convert to fraction form
   1,080.33/1,487.59 = 905.37/x
3. Step 3: Cross multiply
   1,080.33x = 1,487.59 × 905.37
4. Step 4: Simplify right side
   1,080.33x = 1,346,814.83
5. Step 5: Solve for x
   x = 1,346,814.83/1,080.33
6. Step 6: Final answer
   x = 1,246.67