Finding the Fourth Proportional to 30,364.06, 45,540.60 and 8,172.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,364.06 : 45,540.60 = 8,172.31 : x
2. Step 2: Convert to fraction form
   30,364.06/45,540.60 = 8,172.31/x
3. Step 3: Cross multiply
   30,364.06x = 45,540.60 × 8,172.31
4. Step 4: Simplify right side
   30,364.06x = 372,171,900.79
5. Step 5: Solve for x
   x = 372,171,900.79/30,364.06
6. Step 6: Final answer
   x = 12,256.99