Finding the Fourth Proportional to 43,469.39, 65,172.20 and 13,870.17

Step by Step Solution

1. Step 1: Write the proportion equation
   43,469.39 : 65,172.20 = 13,870.17 : x
2. Step 2: Convert to fraction form
   43,469.39/65,172.20 = 13,870.17/x
3. Step 3: Cross multiply
   43,469.39x = 65,172.20 × 13,870.17
4. Step 4: Simplify right side
   43,469.39x = 903,949,423.92
5. Step 5: Solve for x
   x = 903,949,423.92/43,469.39
6. Step 6: Final answer
   x = 20,795.08