Finding the Fourth Proportional to 10,085.50, 15,128.79 and 3,160.54

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.50 : 15,128.79 = 3,160.54 : x
2. Step 2: Convert to fraction form
   10,085.50/15,128.79 = 3,160.54/x
3. Step 3: Cross multiply
   10,085.50x = 15,128.79 × 3,160.54
4. Step 4: Simplify right side
   10,085.50x = 47,815,145.95
5. Step 5: Solve for x
   x = 47,815,145.95/10,085.50
6. Step 6: Final answer
   x = 4,740.98