Finding the Fourth Proportional to 22,390.98, 30,898.32 and 12,317.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,390.98 : 30,898.32 = 12,317.80 : x
2. Step 2: Convert to fraction form
   22,390.98/30,898.32 = 12,317.80/x
3. Step 3: Cross multiply
   22,390.98x = 30,898.32 × 12,317.80
4. Step 4: Simplify right side
   22,390.98x = 380,599,326.10
5. Step 5: Solve for x
   x = 380,599,326.10/22,390.98
6. Step 6: Final answer
   x = 16,997.89