Finding the Fourth Proportional to 172,429.04, 258,672.72 and 78,942.08

Step by Step Solution

1. Step 1: Write the proportion equation
   172,429.04 : 258,672.72 = 78,942.08 : x
2. Step 2: Convert to fraction form
   172,429.04/258,672.72 = 78,942.08/x
3. Step 3: Cross multiply
   172,429.04x = 258,672.72 × 78,942.08
4. Step 4: Simplify right side
   172,429.04x = 20,420,162,556.06
5. Step 5: Solve for x
   x = 20,420,162,556.06/172,429.04
6. Step 6: Final answer
   x = 118,426.47