Finding the Fourth Proportional to 9,056.57, 12,498.09 and 5,279.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,056.57 : 12,498.09 = 5,279.45 : x
2. Step 2: Convert to fraction form
   9,056.57/12,498.09 = 5,279.45/x
3. Step 3: Cross multiply
   9,056.57x = 12,498.09 × 5,279.45
4. Step 4: Simplify right side
   9,056.57x = 65,983,041.25
5. Step 5: Solve for x
   x = 65,983,041.25/9,056.57
6. Step 6: Final answer
   x = 7,285.65