Finding the Fourth Proportional to 323,780.28, 485,633.06 and 87,104.36

Step by Step Solution

1. Step 1: Write the proportion equation
   323,780.28 : 485,633.06 = 87,104.36 : x
2. Step 2: Convert to fraction form
   323,780.28/485,633.06 = 87,104.36/x
3. Step 3: Cross multiply
   323,780.28x = 485,633.06 × 87,104.36
4. Step 4: Simplify right side
   323,780.28x = 42,300,754,022.45
5. Step 5: Solve for x
   x = 42,300,754,022.45/323,780.28
6. Step 6: Final answer
   x = 130,646.48