Finding the Fourth Proportional to 2,164, 2,985.93 and 1,279.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164 : 2,985.93 = 1,279.59 : x
2. Step 2: Convert to fraction form
   2,164/2,985.93 = 1,279.59/x
3. Step 3: Cross multiply
   2,164x = 2,985.93 × 1,279.59
4. Step 4: Simplify right side
   2,164x = 3,820,766.17
5. Step 5: Solve for x
   x = 3,820,766.17/2,164
6. Step 6: Final answer
   x = 1,765.60