Finding the Fourth Proportional to 16,899.72, 23,319.59 and 9,345.03

Step by Step Solution

1. Step 1: Write the proportion equation
   16,899.72 : 23,319.59 = 9,345.03 : x
2. Step 2: Convert to fraction form
   16,899.72/23,319.59 = 9,345.03/x
3. Step 3: Cross multiply
   16,899.72x = 23,319.59 × 9,345.03
4. Step 4: Simplify right side
   16,899.72x = 217,922,221.41
5. Step 5: Solve for x
   x = 217,922,221.41/16,899.72
6. Step 6: Final answer
   x = 12,895.02