Finding the Fourth Proportional to 13,200.72, 18,216.94 and 7,232.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.72 : 18,216.94 = 7,232.38 : x
2. Step 2: Convert to fraction form
   13,200.72/18,216.94 = 7,232.38/x
3. Step 3: Cross multiply
   13,200.72x = 18,216.94 × 7,232.38
4. Step 4: Simplify right side
   13,200.72x = 131,751,832.52
5. Step 5: Solve for x
   x = 131,751,832.52/13,200.72
6. Step 6: Final answer
   x = 9,980.66