Finding the Fourth Proportional to 1,085.79, 1,629.30 and 1,076.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.79 : 1,629.30 = 1,076.98 : x
2. Step 2: Convert to fraction form
   1,085.79/1,629.30 = 1,076.98/x
3. Step 3: Cross multiply
   1,085.79x = 1,629.30 × 1,076.98
4. Step 4: Simplify right side
   1,085.79x = 1,754,723.51
5. Step 5: Solve for x
   x = 1,754,723.51/1,085.79
6. Step 6: Final answer
   x = 1,616.08