Finding the Fourth Proportional to 10,920.15, 16,381.85 and 3,522.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,920.15 : 16,381.85 = 3,522.15 : x
2. Step 2: Convert to fraction form
   10,920.15/16,381.85 = 3,522.15/x
3. Step 3: Cross multiply
   10,920.15x = 16,381.85 × 3,522.15
4. Step 4: Simplify right side
   10,920.15x = 57,699,315.37
5. Step 5: Solve for x
   x = 57,699,315.37/10,920.15
6. Step 6: Final answer
   x = 5,283.75