Finding the Fourth Proportional to 13,726.18, 18,942.29 and 7,438.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,726.18 : 18,942.29 = 7,438.69 : x
2. Step 2: Convert to fraction form
   13,726.18/18,942.29 = 7,438.69/x
3. Step 3: Cross multiply
   13,726.18x = 18,942.29 × 7,438.69
4. Step 4: Simplify right side
   13,726.18x = 140,905,823.20
5. Step 5: Solve for x
   x = 140,905,823.20/13,726.18
6. Step 6: Final answer
   x = 10,265.48