Finding the Fourth Proportional to 12,012.50, 18,004.12 and 8,503.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,012.50 : 18,004.12 = 8,503.50 : x
2. Step 2: Convert to fraction form
   12,012.50/18,004.12 = 8,503.50/x
3. Step 3: Cross multiply
   12,012.50x = 18,004.12 × 8,503.50
4. Step 4: Simplify right side
   12,012.50x = 153,097,901.88
5. Step 5: Solve for x
   x = 153,097,901.88/12,012.50
6. Step 6: Final answer
   x = 12,744.89