Finding the Fourth Proportional to 8,115.02, 12,172.78 and 5,359.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,115.02 : 12,172.78 = 5,359.34 : x
2. Step 2: Convert to fraction form
   8,115.02/12,172.78 = 5,359.34/x
3. Step 3: Cross multiply
   8,115.02x = 12,172.78 × 5,359.34
4. Step 4: Simplify right side
   8,115.02x = 65,238,066.77
5. Step 5: Solve for x
   x = 65,238,066.77/8,115.02
6. Step 6: Final answer
   x = 8,039.18