Finding the Fourth Proportional to 9,056.46, 12,499.06 and 5,279.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,056.46 : 12,499.06 = 5,279.80 : x
2. Step 2: Convert to fraction form
   9,056.46/12,499.06 = 5,279.80/x
3. Step 3: Cross multiply
   9,056.46x = 12,499.06 × 5,279.80
4. Step 4: Simplify right side
   9,056.46x = 65,992,536.99
5. Step 5: Solve for x
   x = 65,992,536.99/9,056.46
6. Step 6: Final answer
   x = 7,286.79