Finding the Fourth Proportional to 15,667.76, 21,621.58 and 8,594.17

Step by Step Solution

1. Step 1: Write the proportion equation
   15,667.76 : 21,621.58 = 8,594.17 : x
2. Step 2: Convert to fraction form
   15,667.76/21,621.58 = 8,594.17/x
3. Step 3: Cross multiply
   15,667.76x = 21,621.58 × 8,594.17
4. Step 4: Simplify right side
   15,667.76x = 185,819,458.65
5. Step 5: Solve for x
   x = 185,819,458.65/15,667.76
6. Step 6: Final answer
   x = 11,859.99