Finding the Fourth Proportional to 2,085.32, 3,128.17 and 769.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.32 : 3,128.17 = 769.01 : x
2. Step 2: Convert to fraction form
   2,085.32/3,128.17 = 769.01/x
3. Step 3: Cross multiply
   2,085.32x = 3,128.17 × 769.01
4. Step 4: Simplify right side
   2,085.32x = 2,405,597.99
5. Step 5: Solve for x
   x = 2,405,597.99/2,085.32
6. Step 6: Final answer
   x = 1,153.59