Finding the Fourth Proportional to 10,919.35, 15,053.45 and 9,233.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,919.35 : 15,053.45 = 9,233.99 : x
2. Step 2: Convert to fraction form
   10,919.35/15,053.45 = 9,233.99/x
3. Step 3: Cross multiply
   10,919.35x = 15,053.45 × 9,233.99
4. Step 4: Simplify right side
   10,919.35x = 139,003,398.23
5. Step 5: Solve for x
   x = 139,003,398.23/10,919.35
6. Step 6: Final answer
   x = 12,730.01