Finding the Fourth Proportional to 10,671.59, 15,985.06 and 8,580.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,671.59 : 15,985.06 = 8,580.27 : x
2. Step 2: Convert to fraction form
   10,671.59/15,985.06 = 8,580.27/x
3. Step 3: Cross multiply
   10,671.59x = 15,985.06 × 8,580.27
4. Step 4: Simplify right side
   10,671.59x = 137,156,130.77
5. Step 5: Solve for x
   x = 137,156,130.77/10,671.59
6. Step 6: Final answer
   x = 12,852.46