Finding the Fourth Proportional to 11,972.86, 17,965.37 and 5,397.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,972.86 : 17,965.37 = 5,397.59 : x
2. Step 2: Convert to fraction form
   11,972.86/17,965.37 = 5,397.59/x
3. Step 3: Cross multiply
   11,972.86x = 17,965.37 × 5,397.59
4. Step 4: Simplify right side
   11,972.86x = 96,969,643.63
5. Step 5: Solve for x
   x = 96,969,643.63/11,972.86
6. Step 6: Final answer
   x = 8,099.12