Finding the Fourth Proportional to 1,086.76, 1,501.86 and 889.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.76 : 1,501.86 = 889.84 : x
2. Step 2: Convert to fraction form
   1,086.76/1,501.86 = 889.84/x
3. Step 3: Cross multiply
   1,086.76x = 1,501.86 × 889.84
4. Step 4: Simplify right side
   1,086.76x = 1,336,415.10
5. Step 5: Solve for x
   x = 1,336,415.10/1,086.76
6. Step 6: Final answer
   x = 1,229.72