Finding the Fourth Proportional to 2,858.73, 3,943.80 and 2,019.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.73 : 3,943.80 = 2,019.30 : x
2. Step 2: Convert to fraction form
   2,858.73/3,943.80 = 2,019.30/x
3. Step 3: Cross multiply
   2,858.73x = 3,943.80 × 2,019.30
4. Step 4: Simplify right side
   2,858.73x = 7,963,715.34
5. Step 5: Solve for x
   x = 7,963,715.34/2,858.73
6. Step 6: Final answer
   x = 2,785.75