Finding the Fourth Proportional to 13,380.34, 18,464.06 and 7,856.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,380.34 : 18,464.06 = 7,856.68 : x
2. Step 2: Convert to fraction form
   13,380.34/18,464.06 = 7,856.68/x
3. Step 3: Cross multiply
   13,380.34x = 18,464.06 × 7,856.68
4. Step 4: Simplify right side
   13,380.34x = 145,066,210.92
5. Step 5: Solve for x
   x = 145,066,210.92/13,380.34
6. Step 6: Final answer
   x = 10,841.74