Finding the Fourth Proportional to 139,035.49, 208,525.56 and 82,130.83

Step by Step Solution

1. Step 1: Write the proportion equation
   139,035.49 : 208,525.56 = 82,130.83 : x
2. Step 2: Convert to fraction form
   139,035.49/208,525.56 = 82,130.83/x
3. Step 3: Cross multiply
   139,035.49x = 208,525.56 × 82,130.83
4. Step 4: Simplify right side
   139,035.49x = 17,126,377,319.01
5. Step 5: Solve for x
   x = 17,126,377,319.01/139,035.49
6. Step 6: Final answer
   x = 123,179.90