Finding the Fourth Proportional to 1,488.50, 2,054.41 and 859.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.50 : 2,054.41 = 859.43 : x
2. Step 2: Convert to fraction form
   1,488.50/2,054.41 = 859.43/x
3. Step 3: Cross multiply
   1,488.50x = 2,054.41 × 859.43
4. Step 4: Simplify right side
   1,488.50x = 1,765,607.02
5. Step 5: Solve for x
   x = 1,765,607.02/1,488.50
6. Step 6: Final answer
   x = 1,186.17