Finding the Fourth Proportional to 22,057.41, 30,430.58 and 12,620.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,057.41 : 30,430.58 = 12,620.91 : x
2. Step 2: Convert to fraction form
   22,057.41/30,430.58 = 12,620.91/x
3. Step 3: Cross multiply
   22,057.41x = 30,430.58 × 12,620.91
4. Step 4: Simplify right side
   22,057.41x = 384,061,548.32
5. Step 5: Solve for x
   x = 384,061,548.32/22,057.41
6. Step 6: Final answer
   x = 17,411.91