Finding the Fourth Proportional to 11,389.16, 17,077.81 and 5,146.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,389.16 : 17,077.81 = 5,146.18 : x
2. Step 2: Convert to fraction form
   11,389.16/17,077.81 = 5,146.18/x
3. Step 3: Cross multiply
   11,389.16x = 17,077.81 × 5,146.18
4. Step 4: Simplify right side
   11,389.16x = 87,885,548.89
5. Step 5: Solve for x
   x = 87,885,548.89/11,389.16
6. Step 6: Final answer
   x = 7,716.60