Finding the Fourth Proportional to 10,524.42, 15,789.23 and 3,128.85

Step by Step Solution

1. Step 1: Write the proportion equation
   10,524.42 : 15,789.23 = 3,128.85 : x
2. Step 2: Convert to fraction form
   10,524.42/15,789.23 = 3,128.85/x
3. Step 3: Cross multiply
   10,524.42x = 15,789.23 × 3,128.85
4. Step 4: Simplify right side
   10,524.42x = 49,402,053.34
5. Step 5: Solve for x
   x = 49,402,053.34/10,524.42
6. Step 6: Final answer
   x = 4,694.04