Finding the Fourth Proportional to 1,185.17, 1,635.33 and 712.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.17 : 1,635.33 = 712.95 : x
2. Step 2: Convert to fraction form
   1,185.17/1,635.33 = 712.95/x
3. Step 3: Cross multiply
   1,185.17x = 1,635.33 × 712.95
4. Step 4: Simplify right side
   1,185.17x = 1,165,908.52
5. Step 5: Solve for x
   x = 1,165,908.52/1,185.17
6. Step 6: Final answer
   x = 983.75