Finding the Fourth Proportional to 1,524.29, 2,103.72 and 861.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,524.29 : 2,103.72 = 861.35 : x
2. Step 2: Convert to fraction form
   1,524.29/2,103.72 = 861.35/x
3. Step 3: Cross multiply
   1,524.29x = 2,103.72 × 861.35
4. Step 4: Simplify right side
   1,524.29x = 1,812,039.22
5. Step 5: Solve for x
   x = 1,812,039.22/1,524.29
6. Step 6: Final answer
   x = 1,188.78