Finding the Fourth Proportional to 16,699.30, 23,045.31 and 9,145.54

Step by Step Solution

1. Step 1: Write the proportion equation
   16,699.30 : 23,045.31 = 9,145.54 : x
2. Step 2: Convert to fraction form
   16,699.30/23,045.31 = 9,145.54/x
3. Step 3: Cross multiply
   16,699.30x = 23,045.31 × 9,145.54
4. Step 4: Simplify right side
   16,699.30x = 210,761,833.22
5. Step 5: Solve for x
   x = 210,761,833.22/16,699.30
6. Step 6: Final answer
   x = 12,621.00