Finding the Fourth Proportional to 12,610.50, 17,402.61 and 7,021.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,610.50 : 17,402.61 = 7,021.62 : x
2. Step 2: Convert to fraction form
   12,610.50/17,402.61 = 7,021.62/x
3. Step 3: Cross multiply
   12,610.50x = 17,402.61 × 7,021.62
4. Step 4: Simplify right side
   12,610.50x = 122,194,514.43
5. Step 5: Solve for x
   x = 122,194,514.43/12,610.50
6. Step 6: Final answer
   x = 9,689.90