Finding the Fourth Proportional to 17,308.81, 23,872.55 and 12,529.45

Step by Step Solution

1. Step 1: Write the proportion equation
   17,308.81 : 23,872.55 = 12,529.45 : x
2. Step 2: Convert to fraction form
   17,308.81/23,872.55 = 12,529.45/x
3. Step 3: Cross multiply
   17,308.81x = 23,872.55 × 12,529.45
4. Step 4: Simplify right side
   17,308.81x = 299,109,921.60
5. Step 5: Solve for x
   x = 299,109,921.60/17,308.81
6. Step 6: Final answer
   x = 17,280.79