Finding the Fourth Proportional to 9,144.83, 12,620.88 and 5,166.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,144.83 : 12,620.88 = 5,166.19 : x
2. Step 2: Convert to fraction form
   9,144.83/12,620.88 = 5,166.19/x
3. Step 3: Cross multiply
   9,144.83x = 12,620.88 × 5,166.19
4. Step 4: Simplify right side
   9,144.83x = 65,201,938.64
5. Step 5: Solve for x
   x = 65,201,938.64/9,144.83
6. Step 6: Final answer
   x = 7,129.93