Finding the Fourth Proportional to 144,491.64, 199,405.98 and 80,830.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,491.64 : 199,405.98 = 80,830.50 : x
2. Step 2: Convert to fraction form
   144,491.64/199,405.98 = 80,830.50/x
3. Step 3: Cross multiply
   144,491.64x = 199,405.98 × 80,830.50
4. Step 4: Simplify right side
   144,491.64x = 16,118,085,066.39
5. Step 5: Solve for x
   x = 16,118,085,066.39/144,491.64
6. Step 6: Final answer
   x = 111,550.29