Finding the Fourth Proportional to 22,390.25, 30,899.83 and 12,318.94

Step by Step Solution

1. Step 1: Write the proportion equation
   22,390.25 : 30,899.83 = 12,318.94 : x
2. Step 2: Convert to fraction form
   22,390.25/30,899.83 = 12,318.94/x
3. Step 3: Cross multiply
   22,390.25x = 30,899.83 × 12,318.94
4. Step 4: Simplify right side
   22,390.25x = 380,653,008.89
5. Step 5: Solve for x
   x = 380,653,008.89/22,390.25
6. Step 6: Final answer
   x = 17,000.84