Finding the Fourth Proportional to 1,688.69, 2,330.27 and 942.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.69 : 2,330.27 = 942.61 : x
2. Step 2: Convert to fraction form
   1,688.69/2,330.27 = 942.61/x
3. Step 3: Cross multiply
   1,688.69x = 2,330.27 × 942.61
4. Step 4: Simplify right side
   1,688.69x = 2,196,524.15
5. Step 5: Solve for x
   x = 2,196,524.15/1,688.69
6. Step 6: Final answer
   x = 1,300.73