Finding the Fourth Proportional to 139,868.96, 209,986.34 and 83,046.58

Step by Step Solution

1. Step 1: Write the proportion equation
   139,868.96 : 209,986.34 = 83,046.58 : x
2. Step 2: Convert to fraction form
   139,868.96/209,986.34 = 83,046.58/x
3. Step 3: Cross multiply
   139,868.96x = 209,986.34 × 83,046.58
4. Step 4: Simplify right side
   139,868.96x = 17,438,646,443.52
5. Step 5: Solve for x
   x = 17,438,646,443.52/139,868.96
6. Step 6: Final answer
   x = 124,678.46