Finding the Fourth Proportional to 1,820.12, 2,727.42 and 1,355.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.12 : 2,727.42 = 1,355.72 : x
2. Step 2: Convert to fraction form
   1,820.12/2,727.42 = 1,355.72/x
3. Step 3: Cross multiply
   1,820.12x = 2,727.42 × 1,355.72
4. Step 4: Simplify right side
   1,820.12x = 3,697,604.21
5. Step 5: Solve for x
   x = 3,697,604.21/1,820.12
6. Step 6: Final answer
   x = 2,031.52