Finding the Fourth Proportional to 1,080.69, 1,491.42 and 614.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.69 : 1,491.42 = 614.94 : x
2. Step 2: Convert to fraction form
   1,080.69/1,491.42 = 614.94/x
3. Step 3: Cross multiply
   1,080.69x = 1,491.42 × 614.94
4. Step 4: Simplify right side
   1,080.69x = 917,128.55
5. Step 5: Solve for x
   x = 917,128.55/1,080.69
6. Step 6: Final answer
   x = 848.65