Finding the Fourth Proportional to 16,980.34, 23,435.68 and 9,429.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,980.34 : 23,435.68 = 9,429.10 : x
2. Step 2: Convert to fraction form
   16,980.34/23,435.68 = 9,429.10/x
3. Step 3: Cross multiply
   16,980.34x = 23,435.68 × 9,429.10
4. Step 4: Simplify right side
   16,980.34x = 220,977,370.29
5. Step 5: Solve for x
   x = 220,977,370.29/16,980.34
6. Step 6: Final answer
   x = 13,013.72