Finding the Fourth Proportional to 15,888.84, 21,926.46 and 8,718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,888.84 : 21,926.46 = 8,718.72 : x
2. Step 2: Convert to fraction form
   15,888.84/21,926.46 = 8,718.72/x
3. Step 3: Cross multiply
   15,888.84x = 21,926.46 × 8,718.72
4. Step 4: Simplify right side
   15,888.84x = 191,170,665.33
5. Step 5: Solve for x
   x = 191,170,665.33/15,888.84
6. Step 6: Final answer
   x = 12,031.76