Finding the Fourth Proportional to 22,364.10, 30,855.69 and 12,931.38

Step by Step Solution

1. Step 1: Write the proportion equation
   22,364.10 : 30,855.69 = 12,931.38 : x
2. Step 2: Convert to fraction form
   22,364.10/30,855.69 = 12,931.38/x
3. Step 3: Cross multiply
   22,364.10x = 30,855.69 × 12,931.38
4. Step 4: Simplify right side
   22,364.10x = 399,006,652.55
5. Step 5: Solve for x
   x = 399,006,652.55/22,364.10
6. Step 6: Final answer
   x = 17,841.39