Finding the Fourth Proportional to 1,918.28, 2,649.81 and 1,423.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.28 : 2,649.81 = 1,423.47 : x
2. Step 2: Convert to fraction form
   1,918.28/2,649.81 = 1,423.47/x
3. Step 3: Cross multiply
   1,918.28x = 2,649.81 × 1,423.47
4. Step 4: Simplify right side
   1,918.28x = 3,771,940.32
5. Step 5: Solve for x
   x = 3,771,940.32/1,918.28
6. Step 6: Final answer
   x = 1,966.31