Finding the Fourth Proportional to 11,917.26, 16,445.43 and 7,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,917.26 : 16,445.43 = 7,200.72 : x
2. Step 2: Convert to fraction form
   11,917.26/16,445.43 = 7,200.72/x
3. Step 3: Cross multiply
   11,917.26x = 16,445.43 × 7,200.72
4. Step 4: Simplify right side
   11,917.26x = 118,418,936.71
5. Step 5: Solve for x
   x = 118,418,936.71/11,917.26
6. Step 6: Final answer
   x = 9,936.76