Finding the Fourth Proportional to 139,302.41, 208,835.56 and 55,121.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,302.41 : 208,835.56 = 55,121.96 : x
2. Step 2: Convert to fraction form
   139,302.41/208,835.56 = 55,121.96/x
3. Step 3: Cross multiply
   139,302.41x = 208,835.56 × 55,121.96
4. Step 4: Simplify right side
   139,302.41x = 11,511,425,975.89
5. Step 5: Solve for x
   x = 11,511,425,975.89/139,302.41
6. Step 6: Final answer
   x = 82,636.23