Finding the Fourth Proportional to 2,056.12, 3,077.43 and 1,859.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.12 : 3,077.43 = 1,859.20 : x
2. Step 2: Convert to fraction form
   2,056.12/3,077.43 = 1,859.20/x
3. Step 3: Cross multiply
   2,056.12x = 3,077.43 × 1,859.20
4. Step 4: Simplify right side
   2,056.12x = 5,721,557.86
5. Step 5: Solve for x
   x = 5,721,557.86/2,056.12
6. Step 6: Final answer
   x = 2,782.70