Finding the Fourth Proportional to 10,073.72, 15,109.40 and 2,678.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,073.72 : 15,109.40 = 2,678.76 : x
2. Step 2: Convert to fraction form
   10,073.72/15,109.40 = 2,678.76/x
3. Step 3: Cross multiply
   10,073.72x = 15,109.40 × 2,678.76
4. Step 4: Simplify right side
   10,073.72x = 40,474,456.34
5. Step 5: Solve for x
   x = 40,474,456.34/10,073.72
6. Step 6: Final answer
   x = 4,017.83