Finding the Fourth Proportional to 3,668.39, 5,498.43 and 1,820.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,668.39 : 5,498.43 = 1,820.78 : x
2. Step 2: Convert to fraction form
   3,668.39/5,498.43 = 1,820.78/x
3. Step 3: Cross multiply
   3,668.39x = 5,498.43 × 1,820.78
4. Step 4: Simplify right side
   3,668.39x = 10,011,431.38
5. Step 5: Solve for x
   x = 10,011,431.38/3,668.39
6. Step 6: Final answer
   x = 2,729.11