Finding the Fourth Proportional to 3,761.61, 5,638.46 and 1,809.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,761.61 : 5,638.46 = 1,809.69 : x
2. Step 2: Convert to fraction form
   3,761.61/5,638.46 = 1,809.69/x
3. Step 3: Cross multiply
   3,761.61x = 5,638.46 × 1,809.69
4. Step 4: Simplify right side
   3,761.61x = 10,203,855.63
5. Step 5: Solve for x
   x = 10,203,855.63/3,761.61
6. Step 6: Final answer
   x = 2,712.63