Finding the Fourth Proportional to 1,095.98, 1,510.56 and 885.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.98 : 1,510.56 = 885.38 : x
2. Step 2: Convert to fraction form
   1,095.98/1,510.56 = 885.38/x
3. Step 3: Cross multiply
   1,095.98x = 1,510.56 × 885.38
4. Step 4: Simplify right side
   1,095.98x = 1,337,412.06
5. Step 5: Solve for x
   x = 1,337,412.06/1,095.98
6. Step 6: Final answer
   x = 1,220.29