Finding the Fourth Proportional to 11,911.72, 16,449.24 and 7,670.14

Step by Step Solution

1. Step 1: Write the proportion equation
   11,911.72 : 16,449.24 = 7,670.14 : x
2. Step 2: Convert to fraction form
   11,911.72/16,449.24 = 7,670.14/x
3. Step 3: Cross multiply
   11,911.72x = 16,449.24 × 7,670.14
4. Step 4: Simplify right side
   11,911.72x = 126,167,973.69
5. Step 5: Solve for x
   x = 126,167,973.69/11,911.72
6. Step 6: Final answer
   x = 10,591.92