Finding the Fourth Proportional to 7,081.80, 10,627.29 and 6,540.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,081.80 : 10,627.29 = 6,540.72 : x
2. Step 2: Convert to fraction form
   7,081.80/10,627.29 = 6,540.72/x
3. Step 3: Cross multiply
   7,081.80x = 10,627.29 × 6,540.72
4. Step 4: Simplify right side
   7,081.80x = 69,510,128.25
5. Step 5: Solve for x
   x = 69,510,128.25/7,081.80
6. Step 6: Final answer
   x = 9,815.32