Finding the Fourth Proportional to 12,459.28, 17,184.78 and 8,473.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,459.28 : 17,184.78 = 8,473.30 : x
2. Step 2: Convert to fraction form
   12,459.28/17,184.78 = 8,473.30/x
3. Step 3: Cross multiply
   12,459.28x = 17,184.78 × 8,473.30
4. Step 4: Simplify right side
   12,459.28x = 145,611,796.37
5. Step 5: Solve for x
   x = 145,611,796.37/12,459.28
6. Step 6: Final answer
   x = 11,687.02