Finding the Fourth Proportional to 1,080.91, 1,491.76 and 708.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.91 : 1,491.76 = 708.09 : x
2. Step 2: Convert to fraction form
   1,080.91/1,491.76 = 708.09/x
3. Step 3: Cross multiply
   1,080.91x = 1,491.76 × 708.09
4. Step 4: Simplify right side
   1,080.91x = 1,056,300.34
5. Step 5: Solve for x
   x = 1,056,300.34/1,080.91
6. Step 6: Final answer
   x = 977.23