Finding the Fourth Proportional to 1,406.04, 1,940.34 and 816.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.04 : 1,940.34 = 816.60 : x
2. Step 2: Convert to fraction form
   1,406.04/1,940.34 = 816.60/x
3. Step 3: Cross multiply
   1,406.04x = 1,940.34 × 816.60
4. Step 4: Simplify right side
   1,406.04x = 1,584,481.64
5. Step 5: Solve for x
   x = 1,584,481.64/1,406.04
6. Step 6: Final answer
   x = 1,126.91