Finding the Fourth Proportional to 10,993.94, 16,463.55 and 7,691.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,993.94 : 16,463.55 = 7,691.57 : x
2. Step 2: Convert to fraction form
   10,993.94/16,463.55 = 7,691.57/x
3. Step 3: Cross multiply
   10,993.94x = 16,463.55 × 7,691.57
4. Step 4: Simplify right side
   10,993.94x = 126,630,547.27
5. Step 5: Solve for x
   x = 126,630,547.27/10,993.94
6. Step 6: Final answer
   x = 11,518.21