Finding the Fourth Proportional to 7,891.72, 10,880.72 and 5,054.43

Step by Step Solution

1. Step 1: Write the proportion equation
   7,891.72 : 10,880.72 = 5,054.43 : x
2. Step 2: Convert to fraction form
   7,891.72/10,880.72 = 5,054.43/x
3. Step 3: Cross multiply
   7,891.72x = 10,880.72 × 5,054.43
4. Step 4: Simplify right side
   7,891.72x = 54,995,837.59
5. Step 5: Solve for x
   x = 54,995,837.59/7,891.72
6. Step 6: Final answer
   x = 6,968.81