Finding the Fourth Proportional to 9,212.80, 12,722.72 and 5,861.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,212.80 : 12,722.72 = 5,861.92 : x
2. Step 2: Convert to fraction form
   9,212.80/12,722.72 = 5,861.92/x
3. Step 3: Cross multiply
   9,212.80x = 12,722.72 × 5,861.92
4. Step 4: Simplify right side
   9,212.80x = 74,579,566.82
5. Step 5: Solve for x
   x = 74,579,566.82/9,212.80
6. Step 6: Final answer
   x = 8,095.21