Finding the Fourth Proportional to 139,028.96, 208,511.24 and 82,884.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,028.96 : 208,511.24 = 82,884.80 : x
2. Step 2: Convert to fraction form
   139,028.96/208,511.24 = 82,884.80/x
3. Step 3: Cross multiply
   139,028.96x = 208,511.24 × 82,884.80
4. Step 4: Simplify right side
   139,028.96x = 17,282,412,425.15
5. Step 5: Solve for x
   x = 17,282,412,425.15/139,028.96
6. Step 6: Final answer
   x = 124,308.00