Finding the Fourth Proportional to 316,026.72, 436,118.72 and 172,786.76

Step by Step Solution

1. Step 1: Write the proportion equation
   316,026.72 : 436,118.72 = 172,786.76 : x
2. Step 2: Convert to fraction form
   316,026.72/436,118.72 = 172,786.76/x
3. Step 3: Cross multiply
   316,026.72x = 436,118.72 × 172,786.76
4. Step 4: Simplify right side
   316,026.72x = 75,355,540,830.51
5. Step 5: Solve for x
   x = 75,355,540,830.51/316,026.72
6. Step 6: Final answer
   x = 238,446.74