Finding the Fourth Proportional to 12,306.78, 16,982.19 and 7,590.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,306.78 : 16,982.19 = 7,590.15 : x
2. Step 2: Convert to fraction form
   12,306.78/16,982.19 = 7,590.15/x
3. Step 3: Cross multiply
   12,306.78x = 16,982.19 × 7,590.15
4. Step 4: Simplify right side
   12,306.78x = 128,897,369.43
5. Step 5: Solve for x
   x = 128,897,369.43/12,306.78
6. Step 6: Final answer
   x = 10,473.69