Finding the Fourth Proportional to 12,390.36, 17,096.89 and 7,084.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,390.36 : 17,096.89 = 7,084.15 : x
2. Step 2: Convert to fraction form
   12,390.36/17,096.89 = 7,084.15/x
3. Step 3: Cross multiply
   12,390.36x = 17,096.89 × 7,084.15
4. Step 4: Simplify right side
   12,390.36x = 121,116,933.29
5. Step 5: Solve for x
   x = 121,116,933.29/12,390.36
6. Step 6: Final answer
   x = 9,775.09