Finding the Fourth Proportional to 43,300.38, 64,952.45 and 13,720.39

Step by Step Solution

1. Step 1: Write the proportion equation
   43,300.38 : 64,952.45 = 13,720.39 : x
2. Step 2: Convert to fraction form
   43,300.38/64,952.45 = 13,720.39/x
3. Step 3: Cross multiply
   43,300.38x = 64,952.45 × 13,720.39
4. Step 4: Simplify right side
   43,300.38x = 891,172,945.46
5. Step 5: Solve for x
   x = 891,172,945.46/43,300.38
6. Step 6: Final answer
   x = 20,581.18