Finding the Fourth Proportional to 43,420.19, 65,097.43 and 13,820.96

Step by Step Solution

1. Step 1: Write the proportion equation
   43,420.19 : 65,097.43 = 13,820.96 : x
2. Step 2: Convert to fraction form
   43,420.19/65,097.43 = 13,820.96/x
3. Step 3: Cross multiply
   43,420.19x = 65,097.43 × 13,820.96
4. Step 4: Simplify right side
   43,420.19x = 899,709,104.32
5. Step 5: Solve for x
   x = 899,709,104.32/43,420.19
6. Step 6: Final answer
   x = 20,720.99