Finding the Fourth Proportional to 1,522.05, 2,100.50 and 858.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,522.05 : 2,100.50 = 858.89 : x
2. Step 2: Convert to fraction form
   1,522.05/2,100.50 = 858.89/x
3. Step 3: Cross multiply
   1,522.05x = 2,100.50 × 858.89
4. Step 4: Simplify right side
   1,522.05x = 1,804,094.15
5. Step 5: Solve for x
   x = 1,804,094.15/1,522.05
6. Step 6: Final answer
   x = 1,185.31