Finding the Fourth Proportional to 1,406.76, 1,940.10 and 994.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.76 : 1,940.10 = 994.60 : x
2. Step 2: Convert to fraction form
   1,406.76/1,940.10 = 994.60/x
3. Step 3: Cross multiply
   1,406.76x = 1,940.10 × 994.60
4. Step 4: Simplify right side
   1,406.76x = 1,929,623.46
5. Step 5: Solve for x
   x = 1,929,623.46/1,406.76
6. Step 6: Final answer
   x = 1,371.68