Finding the Fourth Proportional to 1,041.89, 1,553.67 and 885.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,041.89 : 1,553.67 = 885.15 : x
2. Step 2: Convert to fraction form
   1,041.89/1,553.67 = 885.15/x
3. Step 3: Cross multiply
   1,041.89x = 1,553.67 × 885.15
4. Step 4: Simplify right side
   1,041.89x = 1,375,231.00
5. Step 5: Solve for x
   x = 1,375,231.00/1,041.89
6. Step 6: Final answer
   x = 1,319.95