Finding the Fourth Proportional to 144,003.50, 215,983.34 and 55,298.78

Step by Step Solution

1. Step 1: Write the proportion equation
   144,003.50 : 215,983.34 = 55,298.78 : x
2. Step 2: Convert to fraction form
   144,003.50/215,983.34 = 55,298.78/x
3. Step 3: Cross multiply
   144,003.50x = 215,983.34 × 55,298.78
4. Step 4: Simplify right side
   144,003.50x = 11,943,615,202.33
5. Step 5: Solve for x
   x = 11,943,615,202.33/144,003.50
6. Step 6: Final answer
   x = 82,939.76