Finding the Fourth Proportional to 9,146.98, 12,621.36 and 5,167.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.98 : 12,621.36 = 5,167.99 : x
2. Step 2: Convert to fraction form
   9,146.98/12,621.36 = 5,167.99/x
3. Step 3: Cross multiply
   9,146.98x = 12,621.36 × 5,167.99
4. Step 4: Simplify right side
   9,146.98x = 65,227,062.27
5. Step 5: Solve for x
   x = 65,227,062.27/9,146.98
6. Step 6: Final answer
   x = 7,130.99