Finding the Fourth Proportional to 12,842.55, 19,266.56 and 5,450.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,842.55 : 19,266.56 = 5,450.49 : x
2. Step 2: Convert to fraction form
   12,842.55/19,266.56 = 5,450.49/x
3. Step 3: Cross multiply
   12,842.55x = 19,266.56 × 5,450.49
4. Step 4: Simplify right side
   12,842.55x = 105,012,185.80
5. Step 5: Solve for x
   x = 105,012,185.80/12,842.55
6. Step 6: Final answer
   x = 8,176.90