Finding the Fourth Proportional to 9,671.72, 14,510.56 and 8,550.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,671.72 : 14,510.56 = 8,550.90 : x
2. Step 2: Convert to fraction form
   9,671.72/14,510.56 = 8,550.90/x
3. Step 3: Cross multiply
   9,671.72x = 14,510.56 × 8,550.90
4. Step 4: Simplify right side
   9,671.72x = 124,078,347.50
5. Step 5: Solve for x
   x = 124,078,347.50/9,671.72
6. Step 6: Final answer
   x = 12,828.98