Finding the Fourth Proportional to 145,300.30, 200,519.49 and 81,636.82

Step by Step Solution

1. Step 1: Write the proportion equation
   145,300.30 : 200,519.49 = 81,636.82 : x
2. Step 2: Convert to fraction form
   145,300.30/200,519.49 = 81,636.82/x
3. Step 3: Cross multiply
   145,300.30x = 200,519.49 × 81,636.82
4. Step 4: Simplify right side
   145,300.30x = 16,369,773,511.62
5. Step 5: Solve for x
   x = 16,369,773,511.62/145,300.30
6. Step 6: Final answer
   x = 112,661.66