Finding the Fourth Proportional to 22,379.94, 30,881.91 and 12,946.74

Step by Step Solution

1. Step 1: Write the proportion equation
   22,379.94 : 30,881.91 = 12,946.74 : x
2. Step 2: Convert to fraction form
   22,379.94/30,881.91 = 12,946.74/x
3. Step 3: Cross multiply
   22,379.94x = 30,881.91 × 12,946.74
4. Step 4: Simplify right side
   22,379.94x = 399,820,059.47
5. Step 5: Solve for x
   x = 399,820,059.47/22,379.94
6. Step 6: Final answer
   x = 17,865.11