Finding the Fourth Proportional to 10,031.78, 15,047.46 and 2,636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,031.78 : 15,047.46 = 2,636.72 : x
2. Step 2: Convert to fraction form
   10,031.78/15,047.46 = 2,636.72/x
3. Step 3: Cross multiply
   10,031.78x = 15,047.46 × 2,636.72
4. Step 4: Simplify right side
   10,031.78x = 39,675,938.73
5. Step 5: Solve for x
   x = 39,675,938.73/10,031.78
6. Step 6: Final answer
   x = 3,955.02