Finding the Fourth Proportional to 13,695.86, 18,900.16 and 7,408.23

Step by Step Solution

1. Step 1: Write the proportion equation
   13,695.86 : 18,900.16 = 7,408.23 : x
2. Step 2: Convert to fraction form
   13,695.86/18,900.16 = 7,408.23/x
3. Step 3: Cross multiply
   13,695.86x = 18,900.16 × 7,408.23
4. Step 4: Simplify right side
   13,695.86x = 140,016,823.23
5. Step 5: Solve for x
   x = 140,016,823.23/13,695.86
6. Step 6: Final answer
   x = 10,223.30