Finding the Fourth Proportional to 15,701.25, 21,667.59 and 8,531.09

Step by Step Solution

1. Step 1: Write the proportion equation
   15,701.25 : 21,667.59 = 8,531.09 : x
2. Step 2: Convert to fraction form
   15,701.25/21,667.59 = 8,531.09/x
3. Step 3: Cross multiply
   15,701.25x = 21,667.59 × 8,531.09
4. Step 4: Simplify right side
   15,701.25x = 184,848,160.37
5. Step 5: Solve for x
   x = 184,848,160.37/15,701.25
6. Step 6: Final answer
   x = 11,772.83