Finding the Fourth Proportional to 10,964.10, 16,435.35 and 5,418.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,964.10 : 16,435.35 = 5,418.30 : x
2. Step 2: Convert to fraction form
   10,964.10/16,435.35 = 5,418.30/x
3. Step 3: Cross multiply
   10,964.10x = 16,435.35 × 5,418.30
4. Step 4: Simplify right side
   10,964.10x = 89,051,656.91
5. Step 5: Solve for x
   x = 89,051,656.91/10,964.10
6. Step 6: Final answer
   x = 8,122.11