Finding the Fourth Proportional to 9,178.56, 12,665.72 and 5,145.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,178.56 : 12,665.72 = 5,145.82 : x
2. Step 2: Convert to fraction form
   9,178.56/12,665.72 = 5,145.82/x
3. Step 3: Cross multiply
   9,178.56x = 12,665.72 × 5,145.82
4. Step 4: Simplify right side
   9,178.56x = 65,175,496.49
5. Step 5: Solve for x
   x = 65,175,496.49/9,178.56
6. Step 6: Final answer
   x = 7,100.84