Finding the Fourth Proportional to 8,315.76, 12,476.58 and 5,192.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,315.76 : 12,476.58 = 5,192.15 : x
2. Step 2: Convert to fraction form
   8,315.76/12,476.58 = 5,192.15/x
3. Step 3: Cross multiply
   8,315.76x = 12,476.58 × 5,192.15
4. Step 4: Simplify right side
   8,315.76x = 64,780,212.46
5. Step 5: Solve for x
   x = 64,780,212.46/8,315.76
6. Step 6: Final answer
   x = 7,790.05