Finding the Fourth Proportional to 1,524.72, 2,103.76 and 861.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,524.72 : 2,103.76 = 861.48 : x
2. Step 2: Convert to fraction form
   1,524.72/2,103.76 = 861.48/x
3. Step 3: Cross multiply
   1,524.72x = 2,103.76 × 861.48
4. Step 4: Simplify right side
   1,524.72x = 1,812,342.86
5. Step 5: Solve for x
   x = 1,812,342.86/1,524.72
6. Step 6: Final answer
   x = 1,188.64