Finding the Fourth Proportional to 11,190.16, 15,443.18 and 7,406.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,190.16 : 15,443.18 = 7,406.81 : x
2. Step 2: Convert to fraction form
   11,190.16/15,443.18 = 7,406.81/x
3. Step 3: Cross multiply
   11,190.16x = 15,443.18 × 7,406.81
4. Step 4: Simplify right side
   11,190.16x = 114,384,700.06
5. Step 5: Solve for x
   x = 114,384,700.06/11,190.16
6. Step 6: Final answer
   x = 10,221.90