Finding the Fourth Proportional to 17,667.64, 24,402.72 and 12,880

Step by Step Solution

1. Step 1: Write the proportion equation
   17,667.64 : 24,402.72 = 12,880 : x
2. Step 2: Convert to fraction form
   17,667.64/24,402.72 = 12,880/x
3. Step 3: Cross multiply
   17,667.64x = 24,402.72 × 12,880
4. Step 4: Simplify right side
   17,667.64x = 314,307,033.60
5. Step 5: Solve for x
   x = 314,307,033.60/17,667.64
6. Step 6: Final answer
   x = 17,789.98