Finding the Fourth Proportional to 16,699.55, 23,045.35 and 9,145.89

Step by Step Solution

1. Step 1: Write the proportion equation
   16,699.55 : 23,045.35 = 9,145.89 : x
2. Step 2: Convert to fraction form
   16,699.55/23,045.35 = 9,145.89/x
3. Step 3: Cross multiply
   16,699.55x = 23,045.35 × 9,145.89
4. Step 4: Simplify right side
   16,699.55x = 210,770,152.72
5. Step 5: Solve for x
   x = 210,770,152.72/16,699.55
6. Step 6: Final answer
   x = 12,621.30