Finding the Fourth Proportional to 16,713.86, 23,059.47 and 9,640.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,713.86 : 23,059.47 = 9,640.10 : x
2. Step 2: Convert to fraction form
   16,713.86/23,059.47 = 9,640.10/x
3. Step 3: Cross multiply
   16,713.86x = 23,059.47 × 9,640.10
4. Step 4: Simplify right side
   16,713.86x = 222,295,596.75
5. Step 5: Solve for x
   x = 222,295,596.75/16,713.86
6. Step 6: Final answer
   x = 13,300.08