Finding the Fourth Proportional to 12,690.72, 17,514.06 and 7,025.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,690.72 : 17,514.06 = 7,025.70 : x
2. Step 2: Convert to fraction form
   12,690.72/17,514.06 = 7,025.70/x
3. Step 3: Cross multiply
   12,690.72x = 17,514.06 × 7,025.70
4. Step 4: Simplify right side
   12,690.72x = 123,048,531.34
5. Step 5: Solve for x
   x = 123,048,531.34/12,690.72
6. Step 6: Final answer
   x = 9,695.95