Finding the Fourth Proportional to 10,431.76, 14,384.72 and 8,529.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,431.76 : 14,384.72 = 8,529.12 : x
2. Step 2: Convert to fraction form
   10,431.76/14,384.72 = 8,529.12/x
3. Step 3: Cross multiply
   10,431.76x = 14,384.72 × 8,529.12
4. Step 4: Simplify right side
   10,431.76x = 122,689,003.05
5. Step 5: Solve for x
   x = 122,689,003.05/10,431.76
6. Step 6: Final answer
   x = 11,761.10