Finding the Fourth Proportional to 1,242.86, 1,715.17 and 683.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.86 : 1,715.17 = 683.32 : x
2. Step 2: Convert to fraction form
   1,242.86/1,715.17 = 683.32/x
3. Step 3: Cross multiply
   1,242.86x = 1,715.17 × 683.32
4. Step 4: Simplify right side
   1,242.86x = 1,172,009.96
5. Step 5: Solve for x
   x = 1,172,009.96/1,242.86
6. Step 6: Final answer
   x = 942.99