Finding the Fourth Proportional to 2,056.89, 2,839.13 and 1,780.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.89 : 2,839.13 = 1,780.10 : x
2. Step 2: Convert to fraction form
   2,056.89/2,839.13 = 1,780.10/x
3. Step 3: Cross multiply
   2,056.89x = 2,839.13 × 1,780.10
4. Step 4: Simplify right side
   2,056.89x = 5,053,932.52
5. Step 5: Solve for x
   x = 5,053,932.52/2,056.89
6. Step 6: Final answer
   x = 2,457.07