Finding the Fourth Proportional to 16,985.72, 23,443.06 and 9,434.48

Step by Step Solution

1. Step 1: Write the proportion equation
   16,985.72 : 23,443.06 = 9,434.48 : x
2. Step 2: Convert to fraction form
   16,985.72/23,443.06 = 9,434.48/x
3. Step 3: Cross multiply
   16,985.72x = 23,443.06 × 9,434.48
4. Step 4: Simplify right side
   16,985.72x = 221,173,080.71
5. Step 5: Solve for x
   x = 221,173,080.71/16,985.72
6. Step 6: Final answer
   x = 13,021.12