Finding the Fourth Proportional to 12,979.67, 19,467.37 and 3,620.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,979.67 : 19,467.37 = 3,620.32 : x
2. Step 2: Convert to fraction form
   12,979.67/19,467.37 = 3,620.32/x
3. Step 3: Cross multiply
   12,979.67x = 19,467.37 × 3,620.32
4. Step 4: Simplify right side
   12,979.67x = 70,478,051.24
5. Step 5: Solve for x
   x = 70,478,051.24/12,979.67
6. Step 6: Final answer
   x = 5,429.88