Finding the Fourth Proportional to 9,146.10, 12,621.54 and 5,167.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,146.10 : 12,621.54 = 5,167.98 : x
2. Step 2: Convert to fraction form
   9,146.10/12,621.54 = 5,167.98/x
3. Step 3: Cross multiply
   9,146.10x = 12,621.54 × 5,167.98
4. Step 4: Simplify right side
   9,146.10x = 65,227,866.29
5. Step 5: Solve for x
   x = 65,227,866.29/9,146.10
6. Step 6: Final answer
   x = 7,131.77