Finding the Fourth Proportional to 1,406.06, 1,940.25 and 816.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.06 : 1,940.25 = 816.64 : x
2. Step 2: Convert to fraction form
   1,406.06/1,940.25 = 816.64/x
3. Step 3: Cross multiply
   1,406.06x = 1,940.25 × 816.64
4. Step 4: Simplify right side
   1,406.06x = 1,584,485.76
5. Step 5: Solve for x
   x = 1,584,485.76/1,406.06
6. Step 6: Final answer
   x = 1,126.90