Finding the Fourth Proportional to 1,524.74, 2,104.12 and 861.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,524.74 : 2,104.12 = 861.57 : x
2. Step 2: Convert to fraction form
   1,524.74/2,104.12 = 861.57/x
3. Step 3: Cross multiply
   1,524.74x = 2,104.12 × 861.57
4. Step 4: Simplify right side
   1,524.74x = 1,812,846.67
5. Step 5: Solve for x
   x = 1,812,846.67/1,524.74
6. Step 6: Final answer
   x = 1,188.95