Finding the Fourth Proportional to 16,389.56, 22,619.54 and 9,317.05

Step by Step Solution

1. Step 1: Write the proportion equation
   16,389.56 : 22,619.54 = 9,317.05 : x
2. Step 2: Convert to fraction form
   16,389.56/22,619.54 = 9,317.05/x
3. Step 3: Cross multiply
   16,389.56x = 22,619.54 × 9,317.05
4. Step 4: Simplify right side
   16,389.56x = 210,747,385.16
5. Step 5: Solve for x
   x = 210,747,385.16/16,389.56
6. Step 6: Final answer
   x = 12,858.64