Finding the Fourth Proportional to 9,279.61, 13,905.83 and 5,318.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,279.61 : 13,905.83 = 5,318.71 : x
2. Step 2: Convert to fraction form
   9,279.61/13,905.83 = 5,318.71/x
3. Step 3: Cross multiply
   9,279.61x = 13,905.83 × 5,318.71
4. Step 4: Simplify right side
   9,279.61x = 73,961,103.91
5. Step 5: Solve for x
   x = 73,961,103.91/9,279.61
6. Step 6: Final answer
   x = 7,970.28