Finding the Fourth Proportional to 12,675.72, 17,494.64 and 7,640.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,675.72 : 17,494.64 = 7,640.72 : x
2. Step 2: Convert to fraction form
   12,675.72/17,494.64 = 7,640.72/x
3. Step 3: Cross multiply
   12,675.72x = 17,494.64 × 7,640.72
4. Step 4: Simplify right side
   12,675.72x = 133,671,520.06
5. Step 5: Solve for x
   x = 133,671,520.06/12,675.72
6. Step 6: Final answer
   x = 10,545.48