Finding the Fourth Proportional to 10,072.41, 15,107.05 and 5,145.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,072.41 : 15,107.05 = 5,145.69 : x
2. Step 2: Convert to fraction form
   10,072.41/15,107.05 = 5,145.69/x
3. Step 3: Cross multiply
   10,072.41x = 15,107.05 × 5,145.69
4. Step 4: Simplify right side
   10,072.41x = 77,736,196.11
5. Step 5: Solve for x
   x = 77,736,196.11/10,072.41
6. Step 6: Final answer
   x = 7,717.74