Finding the Fourth Proportional to 144,653.22, 199,638.50 and 80,978.71

Step by Step Solution

1. Step 1: Write the proportion equation
   144,653.22 : 199,638.50 = 80,978.71 : x
2. Step 2: Convert to fraction form
   144,653.22/199,638.50 = 80,978.71/x
3. Step 3: Cross multiply
   144,653.22x = 199,638.50 × 80,978.71
4. Step 4: Simplify right side
   144,653.22x = 16,166,468,196.34
5. Step 5: Solve for x
   x = 16,166,468,196.34/144,653.22
6. Step 6: Final answer
   x = 111,760.17