Finding the Fourth Proportional to 12,761.82, 17,611.16 and 7,172.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,761.82 : 17,611.16 = 7,172.82 : x
2. Step 2: Convert to fraction form
   12,761.82/17,611.16 = 7,172.82/x
3. Step 3: Cross multiply
   12,761.82x = 17,611.16 × 7,172.82
4. Step 4: Simplify right side
   12,761.82x = 126,321,644.81
5. Step 5: Solve for x
   x = 126,321,644.81/12,761.82
6. Step 6: Final answer
   x = 9,898.40