Finding the Fourth Proportional to 1,048.58, 1,444.89 and 861.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.58 : 1,444.89 = 861.47 : x
2. Step 2: Convert to fraction form
   1,048.58/1,444.89 = 861.47/x
3. Step 3: Cross multiply
   1,048.58x = 1,444.89 × 861.47
4. Step 4: Simplify right side
   1,048.58x = 1,244,717.86
5. Step 5: Solve for x
   x = 1,244,717.86/1,048.58
6. Step 6: Final answer
   x = 1,187.06