Finding the Fourth Proportional to 22,391.42, 30,899.36 and 12,319.74

Step by Step Solution

1. Step 1: Write the proportion equation
   22,391.42 : 30,899.36 = 12,319.74 : x
2. Step 2: Convert to fraction form
   22,391.42/30,899.36 = 12,319.74/x
3. Step 3: Cross multiply
   22,391.42x = 30,899.36 × 12,319.74
4. Step 4: Simplify right side
   22,391.42x = 380,672,112.17
5. Step 5: Solve for x
   x = 380,672,112.17/22,391.42
6. Step 6: Final answer
   x = 17,000.81