Finding the Fourth Proportional to 1,426.98, 1,969.20 and 837.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.98 : 1,969.20 = 837.57 : x
2. Step 2: Convert to fraction form
   1,426.98/1,969.20 = 837.57/x
3. Step 3: Cross multiply
   1,426.98x = 1,969.20 × 837.57
4. Step 4: Simplify right side
   1,426.98x = 1,649,342.84
5. Step 5: Solve for x
   x = 1,649,342.84/1,426.98
6. Step 6: Final answer
   x = 1,155.83