Finding the Fourth Proportional to 1,388.73, 1,914.23 and 940.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.73 : 1,914.23 = 940.46 : x
2. Step 2: Convert to fraction form
   1,388.73/1,914.23 = 940.46/x
3. Step 3: Cross multiply
   1,388.73x = 1,914.23 × 940.46
4. Step 4: Simplify right side
   1,388.73x = 1,800,242.47
5. Step 5: Solve for x
   x = 1,800,242.47/1,388.73
6. Step 6: Final answer
   x = 1,296.32