Finding the Fourth Proportional to 1,080.75, 1,491.71 and 615.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.75 : 1,491.71 = 615.27 : x
2. Step 2: Convert to fraction form
   1,080.75/1,491.71 = 615.27/x
3. Step 3: Cross multiply
   1,080.75x = 1,491.71 × 615.27
4. Step 4: Simplify right side
   1,080.75x = 917,801.34
5. Step 5: Solve for x
   x = 917,801.34/1,080.75
6. Step 6: Final answer
   x = 849.23