Finding the Fourth Proportional to 139,538.33, 209,044.12 and 82,441.87

Step by Step Solution

1. Step 1: Write the proportion equation
   139,538.33 : 209,044.12 = 82,441.87 : x
2. Step 2: Convert to fraction form
   139,538.33/209,044.12 = 82,441.87/x
3. Step 3: Cross multiply
   139,538.33x = 209,044.12 × 82,441.87
4. Step 4: Simplify right side
   139,538.33x = 17,233,988,165.30
5. Step 5: Solve for x
   x = 17,233,988,165.30/139,538.33
6. Step 6: Final answer
   x = 123,507.20