Finding the Fourth Proportional to 9,671.31, 13,346.39 and 5,479.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,671.31 : 13,346.39 = 5,479.56 : x
2. Step 2: Convert to fraction form
   9,671.31/13,346.39 = 5,479.56/x
3. Step 3: Cross multiply
   9,671.31x = 13,346.39 × 5,479.56
4. Step 4: Simplify right side
   9,671.31x = 73,132,317.39
5. Step 5: Solve for x
   x = 73,132,317.39/9,671.31
6. Step 6: Final answer
   x = 7,561.78