Finding the Fourth Proportional to 13,057.56, 18,021.71 and 7,752.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,057.56 : 18,021.71 = 7,752.27 : x
2. Step 2: Convert to fraction form
   13,057.56/18,021.71 = 7,752.27/x
3. Step 3: Cross multiply
   13,057.56x = 18,021.71 × 7,752.27
4. Step 4: Simplify right side
   13,057.56x = 139,709,161.78
5. Step 5: Solve for x
   x = 139,709,161.78/13,057.56
6. Step 6: Final answer
   x = 10,699.48