Finding the Fourth Proportional to 43,510.16, 65,273.40 and 13,920.05

Step by Step Solution

1. Step 1: Write the proportion equation
   43,510.16 : 65,273.40 = 13,920.05 : x
2. Step 2: Convert to fraction form
   43,510.16/65,273.40 = 13,920.05/x
3. Step 3: Cross multiply
   43,510.16x = 65,273.40 × 13,920.05
4. Step 4: Simplify right side
   43,510.16x = 908,608,665.30
5. Step 5: Solve for x
   x = 908,608,665.30/43,510.16
6. Step 6: Final answer
   x = 20,882.68