Finding the Fourth Proportional to 2,086.34, 3,128.63 and 852.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.34 : 3,128.63 = 852.93 : x
2. Step 2: Convert to fraction form
   2,086.34/3,128.63 = 852.93/x
3. Step 3: Cross multiply
   2,086.34x = 3,128.63 × 852.93
4. Step 4: Simplify right side
   2,086.34x = 2,668,498.12
5. Step 5: Solve for x
   x = 2,668,498.12/2,086.34
6. Step 6: Final answer
   x = 1,279.04