Finding the Fourth Proportional to 10,524.22, 15,789.12 and 3,128.74

Step by Step Solution

1. Step 1: Write the proportion equation
   10,524.22 : 15,789.12 = 3,128.74 : x
2. Step 2: Convert to fraction form
   10,524.22/15,789.12 = 3,128.74/x
3. Step 3: Cross multiply
   10,524.22x = 15,789.12 × 3,128.74
4. Step 4: Simplify right side
   10,524.22x = 49,400,051.31
5. Step 5: Solve for x
   x = 49,400,051.31/10,524.22
6. Step 6: Final answer
   x = 4,693.94