Finding the Fourth Proportional to 18,770.16, 28,161.68 and 7,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   18,770.16 : 28,161.68 = 7,086.72 : x
2. Step 2: Convert to fraction form
   18,770.16/28,161.68 = 7,086.72/x
3. Step 3: Cross multiply
   18,770.16x = 28,161.68 × 7,086.72
4. Step 4: Simplify right side
   18,770.16x = 199,573,940.89
5. Step 5: Solve for x
   x = 199,573,940.89/18,770.16
6. Step 6: Final answer
   x = 10,632.51