Finding the Fourth Proportional to 15,738.54, 21,718.71 and 8,664.81

Step by Step Solution

1. Step 1: Write the proportion equation
   15,738.54 : 21,718.71 = 8,664.81 : x
2. Step 2: Convert to fraction form
   15,738.54/21,718.71 = 8,664.81/x
3. Step 3: Cross multiply
   15,738.54x = 21,718.71 × 8,664.81
4. Step 4: Simplify right side
   15,738.54x = 188,188,495.60
5. Step 5: Solve for x
   x = 188,188,495.60/15,738.54
6. Step 6: Final answer
   x = 11,957.18