Finding the Fourth Proportional to 1,524.77, 2,104.17 and 861.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,524.77 : 2,104.17 = 861.61 : x
2. Step 2: Convert to fraction form
   1,524.77/2,104.17 = 861.61/x
3. Step 3: Cross multiply
   1,524.77x = 2,104.17 × 861.61
4. Step 4: Simplify right side
   1,524.77x = 1,812,973.91
5. Step 5: Solve for x
   x = 1,812,973.91/1,524.77
6. Step 6: Final answer
   x = 1,189.01