Finding the Fourth Proportional to 143,145.99, 214,485.17 and 87,003.27

Step by Step Solution

1. Step 1: Write the proportion equation
   143,145.99 : 214,485.17 = 87,003.27 : x
2. Step 2: Convert to fraction form
   143,145.99/214,485.17 = 87,003.27/x
3. Step 3: Cross multiply
   143,145.99x = 214,485.17 × 87,003.27
4. Step 4: Simplify right side
   143,145.99x = 18,660,910,721.49
5. Step 5: Solve for x
   x = 18,660,910,721.49/143,145.99
6. Step 6: Final answer
   x = 130,362.79