Finding the Fourth Proportional to 1,426.89, 2,137.53 and 808.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.89 : 2,137.53 = 808.74 : x
2. Step 2: Convert to fraction form
   1,426.89/2,137.53 = 808.74/x
3. Step 3: Cross multiply
   1,426.89x = 2,137.53 × 808.74
4. Step 4: Simplify right side
   1,426.89x = 1,728,706.01
5. Step 5: Solve for x
   x = 1,728,706.01/1,426.89
6. Step 6: Final answer
   x = 1,211.52