Finding the Fourth Proportional to 22,271.16, 30,722.55 and 13,770.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,271.16 : 30,722.55 = 13,770.57 : x
2. Step 2: Convert to fraction form
   22,271.16/30,722.55 = 13,770.57/x
3. Step 3: Cross multiply
   22,271.16x = 30,722.55 × 13,770.57
4. Step 4: Simplify right side
   22,271.16x = 423,066,802.89
5. Step 5: Solve for x
   x = 423,066,802.89/22,271.16
6. Step 6: Final answer
   x = 18,996.17