Finding the Fourth Proportional to 13,109.94, 18,095.67 and 8,920.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109.94 : 18,095.67 = 8,920.62 : x
2. Step 2: Convert to fraction form
   13,109.94/18,095.67 = 8,920.62/x
3. Step 3: Cross multiply
   13,109.94x = 18,095.67 × 8,920.62
4. Step 4: Simplify right side
   13,109.94x = 161,424,595.72
5. Step 5: Solve for x
   x = 161,424,595.72/13,109.94
6. Step 6: Final answer
   x = 12,313.15