Finding the Fourth Proportional to 12,277.60, 18,401.72 and 7,072.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,277.60 : 18,401.72 = 7,072.72 : x
2. Step 2: Convert to fraction form
   12,277.60/18,401.72 = 7,072.72/x
3. Step 3: Cross multiply
   12,277.60x = 18,401.72 × 7,072.72
4. Step 4: Simplify right side
   12,277.60x = 130,150,213.08
5. Step 5: Solve for x
   x = 130,150,213.08/12,277.60
6. Step 6: Final answer
   x = 10,600.62