Finding the Fourth Proportional to 11,969.72, 17,957.55 and 5,216.45

Step by Step Solution

1. Step 1: Write the proportion equation
   11,969.72 : 17,957.55 = 5,216.45 : x
2. Step 2: Convert to fraction form
   11,969.72/17,957.55 = 5,216.45/x
3. Step 3: Cross multiply
   11,969.72x = 17,957.55 × 5,216.45
4. Step 4: Simplify right side
   11,969.72x = 93,674,663.14
5. Step 5: Solve for x
   x = 93,674,663.14/11,969.72
6. Step 6: Final answer
   x = 7,825.97