Finding the Fourth Proportional to 8,210.76, 12,315.69 and 7,296.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,210.76 : 12,315.69 = 7,296.78 : x
2. Step 2: Convert to fraction form
   8,210.76/12,315.69 = 7,296.78/x
3. Step 3: Cross multiply
   8,210.76x = 12,315.69 × 7,296.78
4. Step 4: Simplify right side
   8,210.76x = 89,864,817.77
5. Step 5: Solve for x
   x = 89,864,817.77/8,210.76
6. Step 6: Final answer
   x = 10,944.76