Finding the Fourth Proportional to 43,390.82, 65,085 and 13,810.42

Step by Step Solution

1. Step 1: Write the proportion equation
   43,390.82 : 65,085 = 13,810.42 : x
2. Step 2: Convert to fraction form
   43,390.82/65,085 = 13,810.42/x
3. Step 3: Cross multiply
   43,390.82x = 65,085 × 13,810.42
4. Step 4: Simplify right side
   43,390.82x = 898,851,185.70
5. Step 5: Solve for x
   x = 898,851,185.70/43,390.82
6. Step 6: Final answer
   x = 20,715.24