Finding the Fourth Proportional to 13,868.96, 19,139.24 and 7,581.33

Step by Step Solution

1. Step 1: Write the proportion equation
   13,868.96 : 19,139.24 = 7,581.33 : x
2. Step 2: Convert to fraction form
   13,868.96/19,139.24 = 7,581.33/x
3. Step 3: Cross multiply
   13,868.96x = 19,139.24 × 7,581.33
4. Step 4: Simplify right side
   13,868.96x = 145,100,856.48
5. Step 5: Solve for x
   x = 145,100,856.48/13,868.96
6. Step 6: Final answer
   x = 10,462.28