Finding the Fourth Proportional to 2,189.35, 3,279.70 and 1,264.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.35 : 3,279.70 = 1,264.33 : x
2. Step 2: Convert to fraction form
   2,189.35/3,279.70 = 1,264.33/x
3. Step 3: Cross multiply
   2,189.35x = 3,279.70 × 1,264.33
4. Step 4: Simplify right side
   2,189.35x = 4,146,623.10
5. Step 5: Solve for x
   x = 4,146,623.10/2,189.35
6. Step 6: Final answer
   x = 1,894.00