Finding the Fourth Proportional to 8,972.76, 12,382.81 and 5,196.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,972.76 : 12,382.81 = 5,196.09 : x
2. Step 2: Convert to fraction form
   8,972.76/12,382.81 = 5,196.09/x
3. Step 3: Cross multiply
   8,972.76x = 12,382.81 × 5,196.09
4. Step 4: Simplify right side
   8,972.76x = 64,342,195.21
5. Step 5: Solve for x
   x = 64,342,195.21/8,972.76
6. Step 6: Final answer
   x = 7,170.84