Finding the Fourth Proportional to 323,786.34, 485,677.89 and 87,109.74

Step by Step Solution

1. Step 1: Write the proportion equation
   323,786.34 : 485,677.89 = 87,109.74 : x
2. Step 2: Convert to fraction form
   323,786.34/485,677.89 = 87,109.74/x
3. Step 3: Cross multiply
   323,786.34x = 485,677.89 × 87,109.74
4. Step 4: Simplify right side
   323,786.34x = 42,307,274,721.65
5. Step 5: Solve for x
   x = 42,307,274,721.65/323,786.34
6. Step 6: Final answer
   x = 130,664.17