Finding the Fourth Proportional to 1,522.32, 2,100.70 and 859.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,522.32 : 2,100.70 = 859.20 : x
2. Step 2: Convert to fraction form
   1,522.32/2,100.70 = 859.20/x
3. Step 3: Cross multiply
   1,522.32x = 2,100.70 × 859.20
4. Step 4: Simplify right side
   1,522.32x = 1,804,921.44
5. Step 5: Solve for x
   x = 1,804,921.44/1,522.32
6. Step 6: Final answer
   x = 1,185.64