Finding the Fourth Proportional to 1,858.55, 2,564.82 and 1,072.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,858.55 : 2,564.82 = 1,072.59 : x
2. Step 2: Convert to fraction form
   1,858.55/2,564.82 = 1,072.59/x
3. Step 3: Cross multiply
   1,858.55x = 2,564.82 × 1,072.59
4. Step 4: Simplify right side
   1,858.55x = 2,750,994.92
5. Step 5: Solve for x
   x = 2,750,994.92/1,858.55
6. Step 6: Final answer
   x = 1,480.18