Finding the Fourth Proportional to 10,845.81, 14,969.97 and 7,078.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,845.81 : 14,969.97 = 7,078.38 : x
2. Step 2: Convert to fraction form
   10,845.81/14,969.97 = 7,078.38/x
3. Step 3: Cross multiply
   10,845.81x = 14,969.97 × 7,078.38
4. Step 4: Simplify right side
   10,845.81x = 105,963,136.25
5. Step 5: Solve for x
   x = 105,963,136.25/10,845.81
6. Step 6: Final answer
   x = 9,769.96