Finding the Fourth Proportional to 1,302.10, 1,796.88 and 712.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,302.10 : 1,796.88 = 712.60 : x
2. Step 2: Convert to fraction form
   1,302.10/1,796.88 = 712.60/x
3. Step 3: Cross multiply
   1,302.10x = 1,796.88 × 712.60
4. Step 4: Simplify right side
   1,302.10x = 1,280,456.69
5. Step 5: Solve for x
   x = 1,280,456.69/1,302.10
6. Step 6: Final answer
   x = 983.38