Finding the Fourth Proportional to 16,967.91, 23,415.69 and 9,415.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,967.91 : 23,415.69 = 9,415.40 : x
2. Step 2: Convert to fraction form
   16,967.91/23,415.69 = 9,415.40/x
3. Step 3: Cross multiply
   16,967.91x = 23,415.69 × 9,415.40
4. Step 4: Simplify right side
   16,967.91x = 220,468,005.86
5. Step 5: Solve for x
   x = 220,468,005.86/16,967.91
6. Step 6: Final answer
   x = 12,993.23