Finding the Fourth Proportional to 8,467.47, 12,700.39 and 2,920.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,467.47 : 12,700.39 = 2,920.05 : x
2. Step 2: Convert to fraction form
   8,467.47/12,700.39 = 2,920.05/x
3. Step 3: Cross multiply
   8,467.47x = 12,700.39 × 2,920.05
4. Step 4: Simplify right side
   8,467.47x = 37,085,695.72
5. Step 5: Solve for x
   x = 37,085,695.72/8,467.47
6. Step 6: Final answer
   x = 4,379.79