Finding the Fourth Proportional to 309,073.14, 426,530.34 and 173,106.72

Step by Step Solution

1. Step 1: Write the proportion equation
   309,073.14 : 426,530.34 = 173,106.72 : x
2. Step 2: Convert to fraction form
   309,073.14/426,530.34 = 173,106.72/x
3. Step 3: Cross multiply
   309,073.14x = 426,530.34 × 173,106.72
4. Step 4: Simplify right side
   309,073.14x = 73,835,268,137.88
5. Step 5: Solve for x
   x = 73,835,268,137.88/309,073.14
6. Step 6: Final answer
   x = 238,892.54