Finding the Fourth Proportional to 13,856.22, 19,121.49 and 7,887.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,856.22 : 19,121.49 = 7,887.83 : x
2. Step 2: Convert to fraction form
   13,856.22/19,121.49 = 7,887.83/x
3. Step 3: Cross multiply
   13,856.22x = 19,121.49 × 7,887.83
4. Step 4: Simplify right side
   13,856.22x = 150,826,966.86
5. Step 5: Solve for x
   x = 150,826,966.86/13,856.22
6. Step 6: Final answer
   x = 10,885.15