Finding the Fourth Proportional to 15,714.09, 21,685.86 and 8,544.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,714.09 : 21,685.86 = 8,544.50 : x
2. Step 2: Convert to fraction form
   15,714.09/21,685.86 = 8,544.50/x
3. Step 3: Cross multiply
   15,714.09x = 21,685.86 × 8,544.50
4. Step 4: Simplify right side
   15,714.09x = 185,294,722.34
5. Step 5: Solve for x
   x = 185,294,722.34/15,714.09
6. Step 6: Final answer
   x = 11,791.63