Finding the Fourth Proportional to 8,115.84, 12,172.64 and 3,498.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,115.84 : 12,172.64 = 3,498.24 : x
2. Step 2: Convert to fraction form
   8,115.84/12,172.64 = 3,498.24/x
3. Step 3: Cross multiply
   8,115.84x = 12,172.64 × 3,498.24
4. Step 4: Simplify right side
   8,115.84x = 42,582,816.15
5. Step 5: Solve for x
   x = 42,582,816.15/8,115.84
6. Step 6: Final answer
   x = 5,246.88