Finding the Fourth Proportional to 3,669.60, 5,502.42 and 1,820.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,669.60 : 5,502.42 = 1,820.10 : x
2. Step 2: Convert to fraction form
   3,669.60/5,502.42 = 1,820.10/x
3. Step 3: Cross multiply
   3,669.60x = 5,502.42 × 1,820.10
4. Step 4: Simplify right side
   3,669.60x = 10,014,954.64
5. Step 5: Solve for x
   x = 10,014,954.64/3,669.60
6. Step 6: Final answer
   x = 2,729.17