Finding the Fourth Proportional to 1,820.60, 2,728.46 and 1,126.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.60 : 2,728.46 = 1,126.43 : x
2. Step 2: Convert to fraction form
   1,820.60/2,728.46 = 1,126.43/x
3. Step 3: Cross multiply
   1,820.60x = 2,728.46 × 1,126.43
4. Step 4: Simplify right side
   1,820.60x = 3,073,399.92
5. Step 5: Solve for x
   x = 3,073,399.92/1,820.60
6. Step 6: Final answer
   x = 1,688.13