Finding the Fourth Proportional to 10,042.04, 15,072.41 and 5,115.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,042.04 : 15,072.41 = 5,115.38 : x
2. Step 2: Convert to fraction form
   10,042.04/15,072.41 = 5,115.38/x
3. Step 3: Cross multiply
   10,042.04x = 15,072.41 × 5,115.38
4. Step 4: Simplify right side
   10,042.04x = 77,101,042.09
5. Step 5: Solve for x
   x = 77,101,042.09/10,042.04
6. Step 6: Final answer
   x = 7,677.82