Finding the Fourth Proportional to 9,152.25, 12,631.10 and 5,120.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,152.25 : 12,631.10 = 5,120.54 : x
2. Step 2: Convert to fraction form
   9,152.25/12,631.10 = 5,120.54/x
3. Step 3: Cross multiply
   9,152.25x = 12,631.10 × 5,120.54
4. Step 4: Simplify right side
   9,152.25x = 64,678,052.79
5. Step 5: Solve for x
   x = 64,678,052.79/9,152.25
6. Step 6: Final answer
   x = 7,066.90