Finding the Fourth Proportional to 36,970.72, 55,478.04 and 13,613.56

Step by Step Solution

1. Step 1: Write the proportion equation
   36,970.72 : 55,478.04 = 13,613.56 : x
2. Step 2: Convert to fraction form
   36,970.72/55,478.04 = 13,613.56/x
3. Step 3: Cross multiply
   36,970.72x = 55,478.04 × 13,613.56
4. Step 4: Simplify right side
   36,970.72x = 755,253,626.22
5. Step 5: Solve for x
   x = 755,253,626.22/36,970.72
6. Step 6: Final answer
   x = 20,428.43