Finding the Fourth Proportional to 13,696.36, 18,900.92 and 7,408.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,696.36 : 18,900.92 = 7,408.72 : x
2. Step 2: Convert to fraction form
   13,696.36/18,900.92 = 7,408.72/x
3. Step 3: Cross multiply
   13,696.36x = 18,900.92 × 7,408.72
4. Step 4: Simplify right side
   13,696.36x = 140,031,624.02
5. Step 5: Solve for x
   x = 140,031,624.02/13,696.36
6. Step 6: Final answer
   x = 10,224.00