Finding the Fourth Proportional to 22,379.30, 30,883.42 and 12,307.90

Step by Step Solution

1. Step 1: Write the proportion equation
   22,379.30 : 30,883.42 = 12,307.90 : x
2. Step 2: Convert to fraction form
   22,379.30/30,883.42 = 12,307.90/x
3. Step 3: Cross multiply
   22,379.30x = 30,883.42 × 12,307.90
4. Step 4: Simplify right side
   22,379.30x = 380,109,937.04
5. Step 5: Solve for x
   x = 380,109,937.04/22,379.30
6. Step 6: Final answer
   x = 16,984.89