Finding the Fourth Proportional to 1,892.02, 2,821.94 and 1,859.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.02 : 2,821.94 = 1,859.20 : x
2. Step 2: Convert to fraction form
   1,892.02/2,821.94 = 1,859.20/x
3. Step 3: Cross multiply
   1,892.02x = 2,821.94 × 1,859.20
4. Step 4: Simplify right side
   1,892.02x = 5,246,550.85
5. Step 5: Solve for x
   x = 5,246,550.85/1,892.02
6. Step 6: Final answer
   x = 2,772.99