Finding the Fourth Proportional to 10,715.67, 14,772.39 and 7,878.03

Step by Step Solution

1. Step 1: Write the proportion equation
   10,715.67 : 14,772.39 = 7,878.03 : x
2. Step 2: Convert to fraction form
   10,715.67/14,772.39 = 7,878.03/x
3. Step 3: Cross multiply
   10,715.67x = 14,772.39 × 7,878.03
4. Step 4: Simplify right side
   10,715.67x = 116,377,331.59
5. Step 5: Solve for x
   x = 116,377,331.59/10,715.67
6. Step 6: Final answer
   x = 10,860.48