Finding the Fourth Proportional to 144,043.30, 215,881.35 and 80,863.30

Step by Step Solution

1. Step 1: Write the proportion equation
   144,043.30 : 215,881.35 = 80,863.30 : x
2. Step 2: Convert to fraction form
   144,043.30/215,881.35 = 80,863.30/x
3. Step 3: Cross multiply
   144,043.30x = 215,881.35 × 80,863.30
4. Step 4: Simplify right side
   144,043.30x = 17,456,878,369.46
5. Step 5: Solve for x
   x = 17,456,878,369.46/144,043.30
6. Step 6: Final answer
   x = 121,191.88