Finding the Fourth Proportional to 22,173.64, 30,599.61 and 12,742.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,173.64 : 30,599.61 = 12,742.18 : x
2. Step 2: Convert to fraction form
   22,173.64/30,599.61 = 12,742.18/x
3. Step 3: Cross multiply
   22,173.64x = 30,599.61 × 12,742.18
4. Step 4: Simplify right side
   22,173.64x = 389,905,738.55
5. Step 5: Solve for x
   x = 389,905,738.55/22,173.64
6. Step 6: Final answer
   x = 17,584.20