Finding the Fourth Proportional to 139,669.56, 209,377.26 and 50,902.83

Step by Step Solution

1. Step 1: Write the proportion equation
   139,669.56 : 209,377.26 = 50,902.83 : x
2. Step 2: Convert to fraction form
   139,669.56/209,377.26 = 50,902.83/x
3. Step 3: Cross multiply
   139,669.56x = 209,377.26 × 50,902.83
4. Step 4: Simplify right side
   139,669.56x = 10,657,895,071.65
5. Step 5: Solve for x
   x = 10,657,895,071.65/139,669.56
6. Step 6: Final answer
   x = 76,307.93