Finding the Fourth Proportional to 1,406.18, 1,940.61 and 808.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.18 : 1,940.61 = 808.86 : x
2. Step 2: Convert to fraction form
   1,406.18/1,940.61 = 808.86/x
3. Step 3: Cross multiply
   1,406.18x = 1,940.61 × 808.86
4. Step 4: Simplify right side
   1,406.18x = 1,569,681.80
5. Step 5: Solve for x
   x = 1,569,681.80/1,406.18
6. Step 6: Final answer
   x = 1,116.27