Finding the Fourth Proportional to 22,456, 30,988.86 and 12,385.38

Step by Step Solution

1. Step 1: Write the proportion equation
   22,456 : 30,988.86 = 12,385.38 : x
2. Step 2: Convert to fraction form
   22,456/30,988.86 = 12,385.38/x
3. Step 3: Cross multiply
   22,456x = 30,988.86 × 12,385.38
4. Step 4: Simplify right side
   22,456x = 383,808,806.87
5. Step 5: Solve for x
   x = 383,808,806.87/22,456
6. Step 6: Final answer
   x = 17,091.59