Finding the Fourth Proportional to 11,216.67, 15,475.28 and 7,240.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,216.67 : 15,475.28 = 7,240.42 : x
2. Step 2: Convert to fraction form
   11,216.67/15,475.28 = 7,240.42/x
3. Step 3: Cross multiply
   11,216.67x = 15,475.28 × 7,240.42
4. Step 4: Simplify right side
   11,216.67x = 112,047,526.82
5. Step 5: Solve for x
   x = 112,047,526.82/11,216.67
6. Step 6: Final answer
   x = 9,989.38