Finding the Fourth Proportional to 22,461.28, 30,996.42 and 12,390.00

Step by Step Solution

1. Step 1: Write the proportion equation
   22,461.28 : 30,996.42 = 12,390.00 : x
2. Step 2: Convert to fraction form
   22,461.28/30,996.42 = 12,390.00/x
3. Step 3: Cross multiply
   22,461.28x = 30,996.42 × 12,390.00
4. Step 4: Simplify right side
   22,461.28x = 384,045,426.87
5. Step 5: Solve for x
   x = 384,045,426.87/22,461.28
6. Step 6: Final answer
   x = 17,098.11