Finding the Fourth Proportional to 124,629.81, 172,008.89 and 79,260.50

Step by Step Solution

1. Step 1: Write the proportion equation
   124,629.81 : 172,008.89 = 79,260.50 : x
2. Step 2: Convert to fraction form
   124,629.81/172,008.89 = 79,260.50/x
3. Step 3: Cross multiply
   124,629.81x = 172,008.89 × 79,260.50
4. Step 4: Simplify right side
   124,629.81x = 13,633,509,369.50
5. Step 5: Solve for x
   x = 13,633,509,369.50/124,629.81
6. Step 6: Final answer
   x = 109,392.04