Finding the Fourth Proportional to 1,918.69, 2,878.71 and 945.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.69 : 2,878.71 = 945.47 : x
2. Step 2: Convert to fraction form
   1,918.69/2,878.71 = 945.47/x
3. Step 3: Cross multiply
   1,918.69x = 2,878.71 × 945.47
4. Step 4: Simplify right side
   1,918.69x = 2,721,737.59
5. Step 5: Solve for x
   x = 2,721,737.59/1,918.69
6. Step 6: Final answer
   x = 1,418.54