Finding the Fourth Proportional to 12,687.74, 19,025.61 and 3,799.65

Step by Step Solution

1. Step 1: Write the proportion equation
   12,687.74 : 19,025.61 = 3,799.65 : x
2. Step 2: Convert to fraction form
   12,687.74/19,025.61 = 3,799.65/x
3. Step 3: Cross multiply
   12,687.74x = 19,025.61 × 3,799.65
4. Step 4: Simplify right side
   12,687.74x = 72,290,659.04
5. Step 5: Solve for x
   x = 72,290,659.04/12,687.74
6. Step 6: Final answer
   x = 5,697.68