Finding the Fourth Proportional to 1,242.88, 1,715.10 and 683.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.88 : 1,715.10 = 683.34 : x
2. Step 2: Convert to fraction form
   1,242.88/1,715.10 = 683.34/x
3. Step 3: Cross multiply
   1,242.88x = 1,715.10 × 683.34
4. Step 4: Simplify right side
   1,242.88x = 1,171,996.43
5. Step 5: Solve for x
   x = 1,171,996.43/1,242.88
6. Step 6: Final answer
   x = 942.97