Finding the Fourth Proportional to 13,707.56, 18,916.49 and 7,419.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,707.56 : 18,916.49 = 7,419.94 : x
2. Step 2: Convert to fraction form
   13,707.56/18,916.49 = 7,419.94/x
3. Step 3: Cross multiply
   13,707.56x = 18,916.49 × 7,419.94
4. Step 4: Simplify right side
   13,707.56x = 140,359,150.33
5. Step 5: Solve for x
   x = 140,359,150.33/13,707.56
6. Step 6: Final answer
   x = 10,239.54