Finding the Fourth Proportional to 12,270, 18,401.16 and 4,476.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,270 : 18,401.16 = 4,476.72 : x
2. Step 2: Convert to fraction form
   12,270/18,401.16 = 4,476.72/x
3. Step 3: Cross multiply
   12,270x = 18,401.16 × 4,476.72
4. Step 4: Simplify right side
   12,270x = 82,376,841.00
5. Step 5: Solve for x
   x = 82,376,841.00/12,270
6. Step 6: Final answer
   x = 6,713.68