Finding the Fourth Proportional to 9,112.91, 12,575.76 and 5,133.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,112.91 : 12,575.76 = 5,133.92 : x
2. Step 2: Convert to fraction form
   9,112.91/12,575.76 = 5,133.92/x
3. Step 3: Cross multiply
   9,112.91x = 12,575.76 × 5,133.92
4. Step 4: Simplify right side
   9,112.91x = 64,562,945.78
5. Step 5: Solve for x
   x = 64,562,945.78/9,112.91
6. Step 6: Final answer
   x = 7,084.78