Finding the Fourth Proportional to 8,923.86, 12,315.78 and 5,387.04

Step by Step Solution

1. Step 1: Write the proportion equation
   8,923.86 : 12,315.78 = 5,387.04 : x
2. Step 2: Convert to fraction form
   8,923.86/12,315.78 = 5,387.04/x
3. Step 3: Cross multiply
   8,923.86x = 12,315.78 × 5,387.04
4. Step 4: Simplify right side
   8,923.86x = 66,345,599.49
5. Step 5: Solve for x
   x = 66,345,599.49/8,923.86
6. Step 6: Final answer
   x = 7,434.63