Finding the Fourth Proportional to 12,500.30, 18,751.57 and 3,615.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,500.30 : 18,751.57 = 3,615.49 : x
2. Step 2: Convert to fraction form
   12,500.30/18,751.57 = 3,615.49/x
3. Step 3: Cross multiply
   12,500.30x = 18,751.57 × 3,615.49
4. Step 4: Simplify right side
   12,500.30x = 67,796,113.82
5. Step 5: Solve for x
   x = 67,796,113.82/12,500.30
6. Step 6: Final answer
   x = 5,423.56