Finding the Fourth Proportional to 10,886.08, 16,322.56 and 7,380.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,886.08 : 16,322.56 = 7,380.40 : x
2. Step 2: Convert to fraction form
   10,886.08/16,322.56 = 7,380.40/x
3. Step 3: Cross multiply
   10,886.08x = 16,322.56 × 7,380.40
4. Step 4: Simplify right side
   10,886.08x = 120,467,021.82
5. Step 5: Solve for x
   x = 120,467,021.82/10,886.08
6. Step 6: Final answer
   x = 11,066.15