Finding the Fourth Proportional to 139,450.80, 209,262 and 55,196.58

Step by Step Solution

1. Step 1: Write the proportion equation
   139,450.80 : 209,262 = 55,196.58 : x
2. Step 2: Convert to fraction form
   139,450.80/209,262 = 55,196.58/x
3. Step 3: Cross multiply
   139,450.80x = 209,262 × 55,196.58
4. Step 4: Simplify right side
   139,450.80x = 11,550,546,723.96
5. Step 5: Solve for x
   x = 11,550,546,723.96/139,450.80
6. Step 6: Final answer
   x = 82,828.83