Finding the Fourth Proportional to 12,776.27, 19,164.47 and 4,456.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,776.27 : 19,164.47 = 4,456.35 : x
2. Step 2: Convert to fraction form
   12,776.27/19,164.47 = 4,456.35/x
3. Step 3: Cross multiply
   12,776.27x = 19,164.47 × 4,456.35
4. Step 4: Simplify right side
   12,776.27x = 85,403,563.60
5. Step 5: Solve for x
   x = 85,403,563.60/12,776.27
6. Step 6: Final answer
   x = 6,684.55