Finding the Fourth Proportional to 1,522.56, 2,101.10 and 859.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,522.56 : 2,101.10 = 859.40 : x
2. Step 2: Convert to fraction form
   1,522.56/2,101.10 = 859.40/x
3. Step 3: Cross multiply
   1,522.56x = 2,101.10 × 859.40
4. Step 4: Simplify right side
   1,522.56x = 1,805,670.54
5. Step 5: Solve for x
   x = 1,805,670.54/1,522.56
6. Step 6: Final answer
   x = 1,185.94