Finding the Fourth Proportional to 1,688.64, 2,330.32 and 942.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.64 : 2,330.32 = 942.56 : x
2. Step 2: Convert to fraction form
   1,688.64/2,330.32 = 942.56/x
3. Step 3: Cross multiply
   1,688.64x = 2,330.32 × 942.56
4. Step 4: Simplify right side
   1,688.64x = 2,196,466.42
5. Step 5: Solve for x
   x = 2,196,466.42/1,688.64
6. Step 6: Final answer
   x = 1,300.73