Finding the Fourth Proportional to 7,186.50, 10,780.38 and 1,992.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,186.50 : 10,780.38 = 1,992.42 : x
2. Step 2: Convert to fraction form
   7,186.50/10,780.38 = 1,992.42/x
3. Step 3: Cross multiply
   7,186.50x = 10,780.38 × 1,992.42
4. Step 4: Simplify right side
   7,186.50x = 21,479,044.72
5. Step 5: Solve for x
   x = 21,479,044.72/7,186.50
6. Step 6: Final answer
   x = 2,988.80