Finding the Fourth Proportional to 10,813.58, 16,215.33 and 5,618.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,813.58 : 16,215.33 = 5,618.06 : x
2. Step 2: Convert to fraction form
   10,813.58/16,215.33 = 5,618.06/x
3. Step 3: Cross multiply
   10,813.58x = 16,215.33 × 5,618.06
4. Step 4: Simplify right side
   10,813.58x = 91,098,696.86
5. Step 5: Solve for x
   x = 91,098,696.86/10,813.58
6. Step 6: Final answer
   x = 8,424.47