Finding the Fourth Proportional to 7,656.72, 10,570.68 and 5,142.48

Step by Step Solution

1. Step 1: Write the proportion equation
   7,656.72 : 10,570.68 = 5,142.48 : x
2. Step 2: Convert to fraction form
   7,656.72/10,570.68 = 5,142.48/x
3. Step 3: Cross multiply
   7,656.72x = 10,570.68 × 5,142.48
4. Step 4: Simplify right side
   7,656.72x = 54,359,510.49
5. Step 5: Solve for x
   x = 54,359,510.49/7,656.72
6. Step 6: Final answer
   x = 7,099.58