Finding the Fourth Proportional to 144,450.80, 216,498.72 and 81,137.82

Step by Step Solution

1. Step 1: Write the proportion equation
   144,450.80 : 216,498.72 = 81,137.82 : x
2. Step 2: Convert to fraction form
   144,450.80/216,498.72 = 81,137.82/x
3. Step 3: Cross multiply
   144,450.80x = 216,498.72 × 81,137.82
4. Step 4: Simplify right side
   144,450.80x = 17,566,234,173.59
5. Step 5: Solve for x
   x = 17,566,234,173.59/144,450.80
6. Step 6: Final answer
   x = 121,607.04