Finding the Fourth Proportional to 10,042.78, 15,063.96 and 2,647.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,042.78 : 15,063.96 = 2,647.72 : x
2. Step 2: Convert to fraction form
   10,042.78/15,063.96 = 2,647.72/x
3. Step 3: Cross multiply
   10,042.78x = 15,063.96 × 2,647.72
4. Step 4: Simplify right side
   10,042.78x = 39,885,148.17
5. Step 5: Solve for x
   x = 39,885,148.17/10,042.78
6. Step 6: Final answer
   x = 3,971.52