Finding the Fourth Proportional to 22,461.34, 30,996.80 and 12,390.06

Step by Step Solution

1. Step 1: Write the proportion equation
   22,461.34 : 30,996.80 = 12,390.06 : x
2. Step 2: Convert to fraction form
   22,461.34/30,996.80 = 12,390.06/x
3. Step 3: Cross multiply
   22,461.34x = 30,996.80 × 12,390.06
4. Step 4: Simplify right side
   22,461.34x = 384,052,211.81
5. Step 5: Solve for x
   x = 384,052,211.81/22,461.34
6. Step 6: Final answer
   x = 17,098.37