Finding the Fourth Proportional to 2,864.78, 4,293.33 and 2,357.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.78 : 4,293.33 = 2,357.90 : x
2. Step 2: Convert to fraction form
   2,864.78/4,293.33 = 2,357.90/x
3. Step 3: Cross multiply
   2,864.78x = 4,293.33 × 2,357.90
4. Step 4: Simplify right side
   2,864.78x = 10,123,242.81
5. Step 5: Solve for x
   x = 10,123,242.81/2,864.78
6. Step 6: Final answer
   x = 3,533.69