Finding the Fourth Proportional to 7,815.72, 11,667.72 and 7,542.24

Step by Step Solution

1. Step 1: Write the proportion equation
   7,815.72 : 11,667.72 = 7,542.24 : x
2. Step 2: Convert to fraction form
   7,815.72/11,667.72 = 7,542.24/x
3. Step 3: Cross multiply
   7,815.72x = 11,667.72 × 7,542.24
4. Step 4: Simplify right side
   7,815.72x = 88,000,744.49
5. Step 5: Solve for x
   x = 88,000,744.49/7,815.72
6. Step 6: Final answer
   x = 11,259.45