Finding the Fourth Proportional to 22,057.41, 30,428.94 and 12,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,057.41 : 30,428.94 = 12,620.50 : x
2. Step 2: Convert to fraction form
   22,057.41/30,428.94 = 12,620.50/x
3. Step 3: Cross multiply
   22,057.41x = 30,428.94 × 12,620.50
4. Step 4: Simplify right side
   22,057.41x = 384,028,437.27
5. Step 5: Solve for x
   x = 384,028,437.27/22,057.41
6. Step 6: Final answer
   x = 17,410.40