Finding the Fourth Proportional to 1,237.59, 1,707.89 and 713.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,237.59 : 1,707.89 = 713.63 : x
2. Step 2: Convert to fraction form
   1,237.59/1,707.89 = 713.63/x
3. Step 3: Cross multiply
   1,237.59x = 1,707.89 × 713.63
4. Step 4: Simplify right side
   1,237.59x = 1,218,789.43
5. Step 5: Solve for x
   x = 1,218,789.43/1,237.59
6. Step 6: Final answer
   x = 984.81