Finding the Fourth Proportional to 1,688.24, 2,329.86 and 942.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.24 : 2,329.86 = 942.38 : x
2. Step 2: Convert to fraction form
   1,688.24/2,329.86 = 942.38/x
3. Step 3: Cross multiply
   1,688.24x = 2,329.86 × 942.38
4. Step 4: Simplify right side
   1,688.24x = 2,195,627.19
5. Step 5: Solve for x
   x = 2,195,627.19/1,688.24
6. Step 6: Final answer
   x = 1,300.54