Finding the Fourth Proportional to 11,721.06, 17,569.23 and 7,278.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,721.06 : 17,569.23 = 7,278.69 : x
2. Step 2: Convert to fraction form
   11,721.06/17,569.23 = 7,278.69/x
3. Step 3: Cross multiply
   11,721.06x = 17,569.23 × 7,278.69
4. Step 4: Simplify right side
   11,721.06x = 127,880,978.71
5. Step 5: Solve for x
   x = 127,880,978.71/11,721.06
6. Step 6: Final answer
   x = 10,910.36