Finding the Fourth Proportional to 10,964.31, 16,441.53 and 5,415.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,964.31 : 16,441.53 = 5,415.51 : x
2. Step 2: Convert to fraction form
   10,964.31/16,441.53 = 5,415.51/x
3. Step 3: Cross multiply
   10,964.31x = 16,441.53 × 5,415.51
4. Step 4: Simplify right side
   10,964.31x = 89,039,249.46
5. Step 5: Solve for x
   x = 89,039,249.46/10,964.31
6. Step 6: Final answer
   x = 8,120.82