Finding the Fourth Proportional to 13,865.82, 19,134.89 and 7,578.19

Step by Step Solution

1. Step 1: Write the proportion equation
   13,865.82 : 19,134.89 = 7,578.19 : x
2. Step 2: Convert to fraction form
   13,865.82/19,134.89 = 7,578.19/x
3. Step 3: Cross multiply
   13,865.82x = 19,134.89 × 7,578.19
4. Step 4: Simplify right side
   13,865.82x = 145,007,832.05
5. Step 5: Solve for x
   x = 145,007,832.05/13,865.82
6. Step 6: Final answer
   x = 10,457.93