Finding the Fourth Proportional to 323,976.16, 485,931.42 and 87,342.76

Step by Step Solution

1. Step 1: Write the proportion equation
   323,976.16 : 485,931.42 = 87,342.76 : x
2. Step 2: Convert to fraction form
   323,976.16/485,931.42 = 87,342.76/x
3. Step 3: Cross multiply
   323,976.16x = 485,931.42 × 87,342.76
4. Step 4: Simplify right side
   323,976.16x = 42,442,590,178.69
5. Step 5: Solve for x
   x = 42,442,590,178.69/323,976.16
6. Step 6: Final answer
   x = 131,005.29