Finding the Fourth Proportional to 15,078.89, 20,807.96 and 8,364.13

Step by Step Solution

1. Step 1: Write the proportion equation
   15,078.89 : 20,807.96 = 8,364.13 : x
2. Step 2: Convert to fraction form
   15,078.89/20,807.96 = 8,364.13/x
3. Step 3: Cross multiply
   15,078.89x = 20,807.96 × 8,364.13
4. Step 4: Simplify right side
   15,078.89x = 174,040,388.63
5. Step 5: Solve for x
   x = 174,040,388.63/15,078.89
6. Step 6: Final answer
   x = 11,541.99