Finding the Fourth Proportional to 1,406.94, 1,938.40 and 981.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.94 : 1,938.40 = 981.16 : x
2. Step 2: Convert to fraction form
   1,406.94/1,938.40 = 981.16/x
3. Step 3: Cross multiply
   1,406.94x = 1,938.40 × 981.16
4. Step 4: Simplify right side
   1,406.94x = 1,901,880.54
5. Step 5: Solve for x
   x = 1,901,880.54/1,406.94
6. Step 6: Final answer
   x = 1,351.79