Finding the Fourth Proportional to 9,152.75, 12,631.79 and 5,121.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,152.75 : 12,631.79 = 5,121.04 : x
2. Step 2: Convert to fraction form
   9,152.75/12,631.79 = 5,121.04/x
3. Step 3: Cross multiply
   9,152.75x = 12,631.79 × 5,121.04
4. Step 4: Simplify right side
   9,152.75x = 64,687,901.86
5. Step 5: Solve for x
   x = 64,687,901.86/9,152.75
6. Step 6: Final answer
   x = 7,067.59