Finding the Fourth Proportional to 200,100.82, 300,151.68 and 81,772.16

Step by Step Solution

1. Step 1: Write the proportion equation
   200,100.82 : 300,151.68 = 81,772.16 : x
2. Step 2: Convert to fraction form
   200,100.82/300,151.68 = 81,772.16/x
3. Step 3: Cross multiply
   200,100.82x = 300,151.68 × 81,772.16
4. Step 4: Simplify right side
   200,100.82x = 24,544,051,201.23
5. Step 5: Solve for x
   x = 24,544,051,201.23/200,100.82
6. Step 6: Final answer
   x = 122,658.42