Finding the Fourth Proportional to 22,389.57, 30,897.60 and 12,317.79

Step by Step Solution

1. Step 1: Write the proportion equation
   22,389.57 : 30,897.60 = 12,317.79 : x
2. Step 2: Convert to fraction form
   22,389.57/30,897.60 = 12,317.79/x
3. Step 3: Cross multiply
   22,389.57x = 30,897.60 × 12,317.79
4. Step 4: Simplify right side
   22,389.57x = 380,590,086.72
5. Step 5: Solve for x
   x = 380,590,086.72/22,389.57
6. Step 6: Final answer
   x = 16,998.55