Finding the Fourth Proportional to 13,700.47, 18,906.56 and 7,412.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,700.47 : 18,906.56 = 7,412.71 : x
2. Step 2: Convert to fraction form
   13,700.47/18,906.56 = 7,412.71/x
3. Step 3: Cross multiply
   13,700.47x = 18,906.56 × 7,412.71
4. Step 4: Simplify right side
   13,700.47x = 140,148,751.84
5. Step 5: Solve for x
   x = 140,148,751.84/13,700.47
6. Step 6: Final answer
   x = 10,229.49