Finding the Fourth Proportional to 7,111.68, 10,656.24 and 5,154.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.68 : 10,656.24 = 5,154.72 : x
2. Step 2: Convert to fraction form
   7,111.68/10,656.24 = 5,154.72/x
3. Step 3: Cross multiply
   7,111.68x = 10,656.24 × 5,154.72
4. Step 4: Simplify right side
   7,111.68x = 54,929,933.45
5. Step 5: Solve for x
   x = 54,929,933.45/7,111.68
6. Step 6: Final answer
   x = 7,723.90