Finding the Fourth Proportional to 10,435.86, 15,654.33 and 2,644.74

Step by Step Solution

1. Step 1: Write the proportion equation
   10,435.86 : 15,654.33 = 2,644.74 : x
2. Step 2: Convert to fraction form
   10,435.86/15,654.33 = 2,644.74/x
3. Step 3: Cross multiply
   10,435.86x = 15,654.33 × 2,644.74
4. Step 4: Simplify right side
   10,435.86x = 41,401,632.72
5. Step 5: Solve for x
   x = 41,401,632.72/10,435.86
6. Step 6: Final answer
   x = 3,967.25