Finding the Fourth Proportional to 1,858.19, 2,564.25 and 1,018.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.19 : 2,564.25 = 1,018.89 : x
2. Step 2: Convert to fraction form
   1,858.19/2,564.25 = 1,018.89/x
3. Step 3: Cross multiply
   1,858.19x = 2,564.25 × 1,018.89
4. Step 4: Simplify right side
   1,858.19x = 2,612,670.77
5. Step 5: Solve for x
   x = 2,612,670.77/1,858.19
6. Step 6: Final answer
   x = 1,406.03