Finding the Fourth Proportional to 1,426.59, 1,967.85 and 866.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.59 : 1,967.85 = 866.61 : x
2. Step 2: Convert to fraction form
   1,426.59/1,967.85 = 866.61/x
3. Step 3: Cross multiply
   1,426.59x = 1,967.85 × 866.61
4. Step 4: Simplify right side
   1,426.59x = 1,705,358.49
5. Step 5: Solve for x
   x = 1,705,358.49/1,426.59
6. Step 6: Final answer
   x = 1,195.41