Finding the Fourth Proportional to 2,192.38, 3,019.62 and 1,858.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,192.38 : 3,019.62 = 1,858.78 : x
2. Step 2: Convert to fraction form
   2,192.38/3,019.62 = 1,858.78/x
3. Step 3: Cross multiply
   2,192.38x = 3,019.62 × 1,858.78
4. Step 4: Simplify right side
   2,192.38x = 5,612,809.26
5. Step 5: Solve for x
   x = 5,612,809.26/2,192.38
6. Step 6: Final answer
   x = 2,560.14