Finding the Fourth Proportional to 22,380.89, 30,882.20 and 12,947.63

Step by Step Solution

1. Step 1: Write the proportion equation
   22,380.89 : 30,882.20 = 12,947.63 : x
2. Step 2: Convert to fraction form
   22,380.89/30,882.20 = 12,947.63/x
3. Step 3: Cross multiply
   22,380.89x = 30,882.20 × 12,947.63
4. Step 4: Simplify right side
   22,380.89x = 399,851,080.04
5. Step 5: Solve for x
   x = 399,851,080.04/22,380.89
6. Step 6: Final answer
   x = 17,865.74