Finding the Fourth Proportional to 22,271.04, 30,738.96 and 15,561

Step by Step Solution

1. Step 1: Write the proportion equation
   22,271.04 : 30,738.96 = 15,561 : x
2. Step 2: Convert to fraction form
   22,271.04/30,738.96 = 15,561/x
3. Step 3: Cross multiply
   22,271.04x = 30,738.96 × 15,561
4. Step 4: Simplify right side
   22,271.04x = 478,328,956.56
5. Step 5: Solve for x
   x = 478,328,956.56/22,271.04
6. Step 6: Final answer
   x = 21,477.62