Finding the Fourth Proportional to 10,920.58, 15,035.83 and 9,922.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,920.58 : 15,035.83 = 9,922.87 : x
2. Step 2: Convert to fraction form
   10,920.58/15,035.83 = 9,922.87/x
3. Step 3: Cross multiply
   10,920.58x = 15,035.83 × 9,922.87
4. Step 4: Simplify right side
   10,920.58x = 149,198,586.43
5. Step 5: Solve for x
   x = 149,198,586.43/10,920.58
6. Step 6: Final answer
   x = 13,662.15