Finding the Fourth Proportional to 8,547.57, 12,819.72 and 3,620.67

Step by Step Solution

1. Step 1: Write the proportion equation
   8,547.57 : 12,819.72 = 3,620.67 : x
2. Step 2: Convert to fraction form
   8,547.57/12,819.72 = 3,620.67/x
3. Step 3: Cross multiply
   8,547.57x = 12,819.72 × 3,620.67
4. Step 4: Simplify right side
   8,547.57x = 46,415,975.61
5. Step 5: Solve for x
   x = 46,415,975.61/8,547.57
6. Step 6: Final answer
   x = 5,430.31