Finding the Fourth Proportional to 13,131.21, 18,121.32 and 7,466.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.21 : 18,121.32 = 7,466.18 : x
2. Step 2: Convert to fraction form
   13,131.21/18,121.32 = 7,466.18/x
3. Step 3: Cross multiply
   13,131.21x = 18,121.32 × 7,466.18
4. Step 4: Simplify right side
   13,131.21x = 135,296,946.35
5. Step 5: Solve for x
   x = 135,296,946.35/13,131.21
6. Step 6: Final answer
   x = 10,303.46