Finding the Fourth Proportional to 1,820.10, 2,730.61 and 724.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.10 : 2,730.61 = 724.46 : x
2. Step 2: Convert to fraction form
   1,820.10/2,730.61 = 724.46/x
3. Step 3: Cross multiply
   1,820.10x = 2,730.61 × 724.46
4. Step 4: Simplify right side
   1,820.10x = 1,978,217.72
5. Step 5: Solve for x
   x = 1,978,217.72/1,820.10
6. Step 6: Final answer
   x = 1,086.87