Finding the Fourth Proportional to 144,041.30, 215,878.35 and 80,861.30

Step by Step Solution

1. Step 1: Write the proportion equation
   144,041.30 : 215,878.35 = 80,861.30 : x
2. Step 2: Convert to fraction form
   144,041.30/215,878.35 = 80,861.30/x
3. Step 3: Cross multiply
   144,041.30x = 215,878.35 × 80,861.30
4. Step 4: Simplify right side
   144,041.30x = 17,456,204,022.86
5. Step 5: Solve for x
   x = 17,456,204,022.86/144,041.30
6. Step 6: Final answer
   x = 121,188.88