Finding the Fourth Proportional to 1,858.10, 2,563.90 and 1,111.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.10 : 2,563.90 = 1,111.88 : x
2. Step 2: Convert to fraction form
   1,858.10/2,563.90 = 1,111.88/x
3. Step 3: Cross multiply
   1,858.10x = 2,563.90 × 1,111.88
4. Step 4: Simplify right side
   1,858.10x = 2,850,752.76
5. Step 5: Solve for x
   x = 2,850,752.76/1,858.10
6. Step 6: Final answer
   x = 1,534.23