Finding the Fourth Proportional to 9,470.72, 13,069.76 and 5,279.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,470.72 : 13,069.76 = 5,279.20 : x
2. Step 2: Convert to fraction form
   9,470.72/13,069.76 = 5,279.20/x
3. Step 3: Cross multiply
   9,470.72x = 13,069.76 × 5,279.20
4. Step 4: Simplify right side
   9,470.72x = 68,997,876.99
5. Step 5: Solve for x
   x = 68,997,876.99/9,470.72
6. Step 6: Final answer
   x = 7,285.39