Finding the Fourth Proportional to 139,479.66, 209,204.37 and 82,559.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,479.66 : 209,204.37 = 82,559.34 : x
2. Step 2: Convert to fraction form
   139,479.66/209,204.37 = 82,559.34/x
3. Step 3: Cross multiply
   139,479.66x = 209,204.37 × 82,559.34
4. Step 4: Simplify right side
   139,479.66x = 17,271,774,712.32
5. Step 5: Solve for x
   x = 17,271,774,712.32/139,479.66
6. Step 6: Final answer
   x = 123,830.06