Finding the Fourth Proportional to 15,667.61, 21,621.47 and 8,593.88

Step by Step Solution

1. Step 1: Write the proportion equation
   15,667.61 : 21,621.47 = 8,593.88 : x
2. Step 2: Convert to fraction form
   15,667.61/21,621.47 = 8,593.88/x
3. Step 3: Cross multiply
   15,667.61x = 21,621.47 × 8,593.88
4. Step 4: Simplify right side
   15,667.61x = 185,812,167.53
5. Step 5: Solve for x
   x = 185,812,167.53/15,667.61
6. Step 6: Final answer
   x = 11,859.64