Finding the Fourth Proportional to 10,056.72, 15,002.43 and 8,586.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,056.72 : 15,002.43 = 8,586.57 : x
2. Step 2: Convert to fraction form
   10,056.72/15,002.43 = 8,586.57/x
3. Step 3: Cross multiply
   10,056.72x = 15,002.43 × 8,586.57
4. Step 4: Simplify right side
   10,056.72x = 128,819,415.37
5. Step 5: Solve for x
   x = 128,819,415.37/10,056.72
6. Step 6: Final answer
   x = 12,809.29