Finding the Fourth Proportional to 12,613.01, 18,921.98 and 3,728.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,613.01 : 18,921.98 = 3,728.48 : x
2. Step 2: Convert to fraction form
   12,613.01/18,921.98 = 3,728.48/x
3. Step 3: Cross multiply
   12,613.01x = 18,921.98 × 3,728.48
4. Step 4: Simplify right side
   12,613.01x = 70,550,138.70
5. Step 5: Solve for x
   x = 70,550,138.70/12,613.01
6. Step 6: Final answer
   x = 5,593.44