Finding the Fourth Proportional to 1,236.83, 1,706.73 and 712.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,236.83 : 1,706.73 = 712.86 : x
2. Step 2: Convert to fraction form
   1,236.83/1,706.73 = 712.86/x
3. Step 3: Cross multiply
   1,236.83x = 1,706.73 × 712.86
4. Step 4: Simplify right side
   1,236.83x = 1,216,659.55
5. Step 5: Solve for x
   x = 1,216,659.55/1,236.83
6. Step 6: Final answer
   x = 983.70