Finding the Fourth Proportional to 13,700.17, 18,906.24 and 7,412.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,700.17 : 18,906.24 = 7,412.55 : x
2. Step 2: Convert to fraction form
   13,700.17/18,906.24 = 7,412.55/x
3. Step 3: Cross multiply
   13,700.17x = 18,906.24 × 7,412.55
4. Step 4: Simplify right side
   13,700.17x = 140,143,383.52
5. Step 5: Solve for x
   x = 140,143,383.52/13,700.17
6. Step 6: Final answer
   x = 10,229.32