Finding the Fourth Proportional to 9,112.87, 12,574.23 and 5,078.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,112.87 : 12,574.23 = 5,078.81 : x
2. Step 2: Convert to fraction form
   9,112.87/12,574.23 = 5,078.81/x
3. Step 3: Cross multiply
   9,112.87x = 12,574.23 × 5,078.81
4. Step 4: Simplify right side
   9,112.87x = 63,862,099.67
5. Step 5: Solve for x
   x = 63,862,099.67/9,112.87
6. Step 6: Final answer
   x = 7,007.91