Finding the Fourth Proportional to 1,522.72, 2,101.28 and 859.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,522.72 : 2,101.28 = 859.56 : x
2. Step 2: Convert to fraction form
   1,522.72/2,101.28 = 859.56/x
3. Step 3: Cross multiply
   1,522.72x = 2,101.28 × 859.56
4. Step 4: Simplify right side
   1,522.72x = 1,806,176.24
5. Step 5: Solve for x
   x = 1,806,176.24/1,522.72
6. Step 6: Final answer
   x = 1,186.15