Finding the Fourth Proportional to 8,575.65, 12,870.72 and 3,385.17

Step by Step Solution

1. Step 1: Write the proportion equation
   8,575.65 : 12,870.72 = 3,385.17 : x
2. Step 2: Convert to fraction form
   8,575.65/12,870.72 = 3,385.17/x
3. Step 3: Cross multiply
   8,575.65x = 12,870.72 × 3,385.17
4. Step 4: Simplify right side
   8,575.65x = 43,569,575.22
5. Step 5: Solve for x
   x = 43,569,575.22/8,575.65
6. Step 6: Final answer
   x = 5,080.61