Finding the Fourth Proportional to 43,390.69, 65,092.82 and 13,815.16

Step by Step Solution

1. Step 1: Write the proportion equation
   43,390.69 : 65,092.82 = 13,815.16 : x
2. Step 2: Convert to fraction form
   43,390.69/65,092.82 = 13,815.16/x
3. Step 3: Cross multiply
   43,390.69x = 65,092.82 × 13,815.16
4. Step 4: Simplify right side
   43,390.69x = 899,267,491.34
5. Step 5: Solve for x
   x = 899,267,491.34/43,390.69
6. Step 6: Final answer
   x = 20,724.90