Finding the Fourth Proportional to 1,820.09, 2,730.15 and 724.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.09 : 2,730.15 = 724.46 : x
2. Step 2: Convert to fraction form
   1,820.09/2,730.15 = 724.46/x
3. Step 3: Cross multiply
   1,820.09x = 2,730.15 × 724.46
4. Step 4: Simplify right side
   1,820.09x = 1,977,870.82
5. Step 5: Solve for x
   x = 1,977,870.82/1,820.09
6. Step 6: Final answer
   x = 1,086.69