Finding the Fourth Proportional to 3,618.61, 5,423.58 and 1,864.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,618.61 : 5,423.58 = 1,864.45 : x
2. Step 2: Convert to fraction form
   3,618.61/5,423.58 = 1,864.45/x
3. Step 3: Cross multiply
   3,618.61x = 5,423.58 × 1,864.45
4. Step 4: Simplify right side
   3,618.61x = 10,111,993.73
5. Step 5: Solve for x
   x = 10,111,993.73/3,618.61
6. Step 6: Final answer
   x = 2,794.44