Finding the Fourth Proportional to 11,322.64, 16,867.22 and 10,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,322.64 : 16,867.22 = 10,978.72 : x
2. Step 2: Convert to fraction form
   11,322.64/16,867.22 = 10,978.72/x
3. Step 3: Cross multiply
   11,322.64x = 16,867.22 × 10,978.72
4. Step 4: Simplify right side
   11,322.64x = 185,180,485.56
5. Step 5: Solve for x
   x = 185,180,485.56/11,322.64
6. Step 6: Final answer
   x = 16,354.89