Finding the Fourth Proportional to 9,819.78, 14,727.78 and 3,245.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,819.78 : 14,727.78 = 3,245.15 : x
2. Step 2: Convert to fraction form
   9,819.78/14,727.78 = 3,245.15/x
3. Step 3: Cross multiply
   9,819.78x = 14,727.78 × 3,245.15
4. Step 4: Simplify right side
   9,819.78x = 47,793,781.63
5. Step 5: Solve for x
   x = 47,793,781.63/9,819.78
6. Step 6: Final answer
   x = 4,867.09