Finding the Fourth Proportional to 9,145.98, 12,620.88 and 5,167.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145.98 : 12,620.88 = 5,167.53 : x
2. Step 2: Convert to fraction form
   9,145.98/12,620.88 = 5,167.53/x
3. Step 3: Cross multiply
   9,145.98x = 12,620.88 × 5,167.53
4. Step 4: Simplify right side
   9,145.98x = 65,218,776.03
5. Step 5: Solve for x
   x = 65,218,776.03/9,145.98
6. Step 6: Final answer
   x = 7,130.87