Finding the Fourth Proportional to 12,690.27, 17,514.59 and 7,655.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,690.27 : 17,514.59 = 7,655.22 : x
2. Step 2: Convert to fraction form
   12,690.27/17,514.59 = 7,655.22/x
3. Step 3: Cross multiply
   12,690.27x = 17,514.59 × 7,655.22
4. Step 4: Simplify right side
   12,690.27x = 134,077,952.09
5. Step 5: Solve for x
   x = 134,077,952.09/12,690.27
6. Step 6: Final answer
   x = 10,565.41