Finding the Fourth Proportional to 86,002.65, 118,662.89 and 50,172.21

Step by Step Solution

1. Step 1: Write the proportion equation
   86,002.65 : 118,662.89 = 50,172.21 : x
2. Step 2: Convert to fraction form
   86,002.65/118,662.89 = 50,172.21/x
3. Step 3: Cross multiply
   86,002.65x = 118,662.89 × 50,172.21
4. Step 4: Simplify right side
   86,002.65x = 5,953,579,185.43
5. Step 5: Solve for x
   x = 5,953,579,185.43/86,002.65
6. Step 6: Final answer
   x = 69,225.53