Finding the Fourth Proportional to 1,253.49, 1,729.83 and 686.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,253.49 : 1,729.83 = 686.34 : x
2. Step 2: Convert to fraction form
   1,253.49/1,729.83 = 686.34/x
3. Step 3: Cross multiply
   1,253.49x = 1,729.83 × 686.34
4. Step 4: Simplify right side
   1,253.49x = 1,187,251.52
5. Step 5: Solve for x
   x = 1,187,251.52/1,253.49
6. Step 6: Final answer
   x = 947.16