Finding the Fourth Proportional to 11,185.16, 15,437.01 and 7,217.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,185.16 : 15,437.01 = 7,217.81 : x
2. Step 2: Convert to fraction form
   11,185.16/15,437.01 = 7,217.81/x
3. Step 3: Cross multiply
   11,185.16x = 15,437.01 × 7,217.81
4. Step 4: Simplify right side
   11,185.16x = 111,421,405.15
5. Step 5: Solve for x
   x = 111,421,405.15/11,185.16
6. Step 6: Final answer
   x = 9,961.54