Finding the Fourth Proportional to 22,343.79, 30,871.76 and 18,611.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,343.79 : 30,871.76 = 18,611.31 : x
2. Step 2: Convert to fraction form
   22,343.79/30,871.76 = 18,611.31/x
3. Step 3: Cross multiply
   22,343.79x = 30,871.76 × 18,611.31
4. Step 4: Simplify right side
   22,343.79x = 574,563,802.55
5. Step 5: Solve for x
   x = 574,563,802.55/22,343.79
6. Step 6: Final answer
   x = 25,714.70