Finding the Fourth Proportional to 1,858.98, 2,563.28 and 1,392.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.98 : 2,563.28 = 1,392.42 : x
2. Step 2: Convert to fraction form
   1,858.98/2,563.28 = 1,392.42/x
3. Step 3: Cross multiply
   1,858.98x = 2,563.28 × 1,392.42
4. Step 4: Simplify right side
   1,858.98x = 3,569,162.34
5. Step 5: Solve for x
   x = 3,569,162.34/1,858.98
6. Step 6: Final answer
   x = 1,919.96