Finding the Fourth Proportional to 12,912.50, 17,819.25 and 7,024.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,912.50 : 17,819.25 = 7,024.50 : x
2. Step 2: Convert to fraction form
   12,912.50/17,819.25 = 7,024.50/x
3. Step 3: Cross multiply
   12,912.50x = 17,819.25 × 7,024.50
4. Step 4: Simplify right side
   12,912.50x = 125,171,321.63
5. Step 5: Solve for x
   x = 125,171,321.63/12,912.50
6. Step 6: Final answer
   x = 9,693.81