Finding the Fourth Proportional to 39,867.02, 55,019.59 and 21,965.24

Step by Step Solution

1. Step 1: Write the proportion equation
   39,867.02 : 55,019.59 = 21,965.24 : x
2. Step 2: Convert to fraction form
   39,867.02/55,019.59 = 21,965.24/x
3. Step 3: Cross multiply
   39,867.02x = 55,019.59 × 21,965.24
4. Step 4: Simplify right side
   39,867.02x = 1,208,518,581.69
5. Step 5: Solve for x
   x = 1,208,518,581.69/39,867.02
6. Step 6: Final answer
   x = 30,313.74