Finding the Fourth Proportional to 10,085.75, 15,128.69 and 3,512.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.75 : 15,128.69 = 3,512.06 : x
2. Step 2: Convert to fraction form
   10,085.75/15,128.69 = 3,512.06/x
3. Step 3: Cross multiply
   10,085.75x = 15,128.69 × 3,512.06
4. Step 4: Simplify right side
   10,085.75x = 53,132,773.80
5. Step 5: Solve for x
   x = 53,132,773.80/10,085.75
6. Step 6: Final answer
   x = 5,268.11