Finding the Fourth Proportional to 9,112.74, 12,574.06 and 5,078.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,112.74 : 12,574.06 = 5,078.69 : x
2. Step 2: Convert to fraction form
   9,112.74/12,574.06 = 5,078.69/x
3. Step 3: Cross multiply
   9,112.74x = 12,574.06 × 5,078.69
4. Step 4: Simplify right side
   9,112.74x = 63,859,664.52
5. Step 5: Solve for x
   x = 63,859,664.52/9,112.74
6. Step 6: Final answer
   x = 7,007.74