Finding the Fourth Proportional to 10,911.69, 16,368.18 and 3,416.65

Step by Step Solution

1. Step 1: Write the proportion equation
   10,911.69 : 16,368.18 = 3,416.65 : x
2. Step 2: Convert to fraction form
   10,911.69/16,368.18 = 3,416.65/x
3. Step 3: Cross multiply
   10,911.69x = 16,368.18 × 3,416.65
4. Step 4: Simplify right side
   10,911.69x = 55,924,342.20
5. Step 5: Solve for x
   x = 55,924,342.20/10,911.69
6. Step 6: Final answer
   x = 5,125.18