Finding the Fourth Proportional to 9,807.06, 14,709.72 and 2,786.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,807.06 : 14,709.72 = 2,786.78 : x
2. Step 2: Convert to fraction form
   9,807.06/14,709.72 = 2,786.78/x
3. Step 3: Cross multiply
   9,807.06x = 14,709.72 × 2,786.78
4. Step 4: Simplify right side
   9,807.06x = 40,992,753.50
5. Step 5: Solve for x
   x = 40,992,753.50/9,807.06
6. Step 6: Final answer
   x = 4,179.92