Finding the Fourth Proportional to 1,522.35, 2,100.78 and 859.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,522.35 : 2,100.78 = 859.23 : x
2. Step 2: Convert to fraction form
   1,522.35/2,100.78 = 859.23/x
3. Step 3: Cross multiply
   1,522.35x = 2,100.78 × 859.23
4. Step 4: Simplify right side
   1,522.35x = 1,805,053.20
5. Step 5: Solve for x
   x = 1,805,053.20/1,522.35
6. Step 6: Final answer
   x = 1,185.70