Finding the Fourth Proportional to 8,345.84, 12,520.46 and 3,415.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,345.84 : 12,520.46 = 3,415.89 : x
2. Step 2: Convert to fraction form
   8,345.84/12,520.46 = 3,415.89/x
3. Step 3: Cross multiply
   8,345.84x = 12,520.46 × 3,415.89
4. Step 4: Simplify right side
   8,345.84x = 42,768,522.65
5. Step 5: Solve for x
   x = 42,768,522.65/8,345.84
6. Step 6: Final answer
   x = 5,124.53