Finding the Fourth Proportional to 1,242.89, 1,715.18 and 683.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.89 : 1,715.18 = 683.37 : x
2. Step 2: Convert to fraction form
   1,242.89/1,715.18 = 683.37/x
3. Step 3: Cross multiply
   1,242.89x = 1,715.18 × 683.37
4. Step 4: Simplify right side
   1,242.89x = 1,172,102.56
5. Step 5: Solve for x
   x = 1,172,102.56/1,242.89
6. Step 6: Final answer
   x = 943.05