Finding the Fourth Proportional to 9,145.32, 12,620.64 and 5,166.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.32 : 12,620.64 = 5,166.48 : x
2. Step 2: Convert to fraction form
   9,145.32/12,620.64 = 5,166.48/x
3. Step 3: Cross multiply
   9,145.32x = 12,620.64 × 5,166.48
4. Step 4: Simplify right side
   9,145.32x = 65,204,284.15
5. Step 5: Solve for x
   x = 65,204,284.15/9,145.32
6. Step 6: Final answer
   x = 7,129.80