Finding the Fourth Proportional to 8,976.83, 12,387.54 and 5,199.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,976.83 : 12,387.54 = 5,199.71 : x
2. Step 2: Convert to fraction form
   8,976.83/12,387.54 = 5,199.71/x
3. Step 3: Cross multiply
   8,976.83x = 12,387.54 × 5,199.71
4. Step 4: Simplify right side
   8,976.83x = 64,411,553.68
5. Step 5: Solve for x
   x = 64,411,553.68/8,976.83
6. Step 6: Final answer
   x = 7,175.32