Finding the Fourth Proportional to 12,778.79, 19,162.69 and 4,456.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,778.79 : 19,162.69 = 4,456.34 : x
2. Step 2: Convert to fraction form
   12,778.79/19,162.69 = 4,456.34/x
3. Step 3: Cross multiply
   12,778.79x = 19,162.69 × 4,456.34
4. Step 4: Simplify right side
   12,778.79x = 85,395,426.86
5. Step 5: Solve for x
   x = 85,395,426.86/12,778.79
6. Step 6: Final answer
   x = 6,682.59